How Meghan Markle's family will be involved in the royal wedding

Meghan Markle and Prince Harry's royal wedding preparations are underway -- including what role the bride-to-be's family will play!

A source tells ET that Meghan wants both her parents to be involved in her May 19 nuptials.

"Meghan asked her father to walk her down the aisle,” the source says. "She does want him included and she wants to uphold tradition."

Meghan's father, Thomas Markle -- a 73-year-old retired lighting director who was divorced from Meghan's mother, Doria Radlan, in 1988 -- has, in recent years, moved to the quiet seaside town of Rosarito, Mexico, and has remained relatively off-the-grid.

As for Meghan's mother, the two appear to have close relationship and are frequently photographed together. The source says Radlan "will also have a significant role that day."

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Prince Harry and Meghan Markle in 2017
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Prince Harry and Meghan Markle in 2017
US actress and fiancee of Britain's Prince Harry Meghan Markle (L) and Britain's Prince Harry (R) stand together as they wait to see off Britain's Queen Elizabeth II after attending the Royal Family's traditional Christmas Day church service at St Mary Magdalene Church in Sandringham, Norfolk, eastern England, on December 25, 2017. / AFP PHOTO / Adrian DENNIS (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
The Duke and Duchess of Cambridge, Meghan Markle and Prince Harry leave the Christmas Day morning church service at St Mary Magdalene Church in Sandringham, Norfolk. (Photo by Joe Giddens/PA Images via Getty Images)
KING'S LYNN, ENGLAND - DECEMBER 25: Prince Charles; Prince of Wales Catherine, Duchess of Cambridge, Meghan Markle and Prince Harry attend Christmas Day Church service at Church of St Mary Magdalene on December 25, 2017 in King's Lynn, England. (Photo by Chris Jackson/Getty Images)
KING'S LYNN, ENGLAND - DECEMBER 25: (L-R) Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Meghan Markle and Prince Harry attend Christmas Day Church service at Church of St Mary Magdalene on December 25, 2017 in King's Lynn, England. (Photo by Chris Jackson/Getty Images)
TOPSHOT - (L-R) US actress and fiancee of Britain's Prince Harry Meghan Markle and Britain's Prince Harry arrive to attend the Royal Family's traditional Christmas Day church service at St Mary Magdalene Church in Sandringham, Norfolk, eastern England, on December 25, 2017. / AFP PHOTO / Adrian DENNIS (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
(L-R) US actress and fiancee of Britain's Prince Harry Meghan Markle and Britain's Prince Harry arrive to attend the Royal Family's traditional Christmas Day church service at St Mary Magdalene Church in Sandringham, Norfolk, eastern England, on December 25, 2017. / AFP PHOTO / Adrian DENNIS (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
Terms of release, which must be included and passed-on to anyone to whom this image is supplied: USE AFTER 31/05/2018 must be cleared by Kensington Palace. This photograph is for editorial use only. NO commercial use. NO use in calendars, books or supplements. Use on a cover, or for any other purpose, will require approval from Art Partner and the Kensington Palace Press Office. There is no charge for the supply, release or publication of this official photograph. This photograph must not be digitally enhanced, manipulated or modified and must be used substantially uncropped. Copyright in the photographs is vested in Prince Harry and Ms. Meghan Markle. Publications are asked to credit the photograph to Alexi Lubomirski. WINDSOR, UNITED KINGDOM - DECEMBER: (EDITOR'S NOTE: Image was shot in black and white. Colour version not available.) In this handout photo provided by Kensington Palace, Prince Harry and Meghan Markle pose for one of two official engagement photos at Frogmore House in December, 2017 in Windsor, United Kingdom. (Photo by Alexi Lubomirski via Getty Images)
NO SALES. Terms of release, which must be included and passed-on to anyone to whom this image is supplied: USE AFTER 31/05/2018 must be cleared by Kensington Palace. This photograph is for editorial use only. NO commercial use. NO use in calendars, books or supplements. Use on a cover, or for any other purpose, will require approval from Art Partner and the Kensington Palace Press Office. There is no charge for the supply, release or publication of this official photograph. This photograph must not be digitally enhanced, manipulated or modified and must be used substantially uncropped. Copyright in the photographs is vested in Prince Harry and Ms. Meghan Markle. Publications are asked to credit the photograph to Alexi Lubomirski. WINDSOR, UNITED KINGDOM - DECEMBER: In this handout photo provided by Kensington Palace, Prince Harry and Meghan Markle pose for one of two official engagement photos at Frogmore House in December, 2017 in Windsor, United Kingdom. (Photo by Alexi Lubomirski via Getty Images)
NO SALES. Terms of release, which must be included and passed-on to anyone to whom this image is supplied: USE AFTER 31/05/2018 must be cleared by Kensington Palace. This photograph is for editorial use only. NO commercial use. NO use in calendars, books or supplements. Use on a cover, or for any other purpose, will require approval from Art Partner and the Kensington Palace Press Office. There is no charge for the supply, release or publication of this official photograph. This photograph must not be digitally enhanced, manipulated or modified and must be used substantially uncropped. Copyright in the photographs is vested in Prince Harry and Ms. Meghan Markle. Publications are asked to credit the photograph to Alexi Lubomirski. WINDSOR, UNITED KINGDOM - DECEMBER: (EDITOR'S NOTE: Image was shot in black and white. Colour version not available.) In this handout photo provided by Kensington Palace, Prince Harry and Meghan Markle pose for one of two official engagement photos at Frogmore House in December, 2017 in Windsor, United Kingdom. (Photo by Alexi Lubomirski via Getty Images)
Prince Harry and Meghan Markle arriving for the Queen's Christmas lunch at Buckingham Palace, London. (Photo by Jonathan Brady/PA Images via Getty Images)
LONDON, ENGLAND - DECEMBER 20: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince Harry and Meghan Markle arrive for the Queen's Christmas lunch at Buckingham Palace on December 20, 2017 in London, England. (Photo by Karwai Tang/WireImage)
NOTTINGHAM, ENGLAND - DECEMBER 01: Prince Harry and Meghan Markle go on a walk about at Nottingham Contemporary on December 1, 2017 in Nottingham, England. Prince Harry and Meghan Markle announced their engagement on Monday 27th November 2017 and will marry at St George's Chapel, Windsor Castle in May 2018. (Photo by Samir Hussein/Samir Hussein/WireImage)
NOTTINGHAM, ENGLAND - DECEMBER 01: Prince Harry and Meghan Markle go on a walk about at Nottingham Contemporary on December 1, 2017 in Nottingham, England. Prince Harry and Meghan Markle announced their engagement on Monday 27th November 2017 and will marry at St George's Chapel, Windsor Castle in May 2018. (Photo by Samir Hussein/WireImage)
NOTTINGHAM, UNITED KINGDOM - DECEMBER 01: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince Harry and Meghan Markle attend a Terrence Higgins Trust World AIDS Day charity fair at Nottingham Contemporary on December 1, 2017 in Nottingham, England. Prince Harry and Meghan Markle announced their engagement on Monday 27th November 2017 and will marry at St George's Chapel, Windsor in May 2018. (Photo by Max Mumby/Indigo/Getty Images)
NOTTINGHAM, ENGLAND - DECEMBER 01: Prince Harry and fiancee Meghan Markle attend the Terrence Higgins Trust World AIDS Day charity fair at Nottingham Contemporary on December 1, 2017 in Nottingham, England. Prince Harry and Meghan Markle announced their engagement on Monday 27th November 2017 and will marry at St George's Chapel, Windsor Castle in May 2018. (Photo by Karwai Tang/WireImage)
Britain's Prince Harry and his fiancee, US actress Meghan Markle gesture during their visit to Nottingham Academy in Nottingham, central England, on December 1, 2017. Prince Harry and his American actress fiancee Meghan Markle were welcomed by hundreds of people on their first royal visit as a couple since announcing their engagement this week. / AFP PHOTO / POOL / Andy Stenning (Photo credit should read ANDY STENNING/AFP/Getty Images)
NOTTINGHAM, ENGLAND - DECEMBER 01: Prince Harry and his fiancee US actress Meghan Markle pose for a photograph with the cast and crew of a hip hop opera performed by young people involved in the Full Effect programme at the Nottingham Academy school on December 1, 2017 in Nottingham, England. Prince Harry and Meghan Markle announced their engagement on Monday 27th November 2017 and will marry at St George's Chapel, Windsor in May 2018. (Photo by Matt Dunham - WPA Pool/Getty Images)
NOTTINGHAM, ENGLAND - DECEMBER 01: Prince Harry and his fiancee US actress Meghan Markle visit the Terrence Higgins Trust World AIDS Day charity fair at Nottingham Contemporary on December 1, 2017 in Nottingham, England. Prince Harry and Meghan Markle announced their engagement on Monday 27th November 2017 and will marry at St George's Chapel, Windsor in May 2018. (Photo by Adrian Dennis - WPA Pool/Getty Images)
Britain's Prince Harry and his fiancee US actress Meghan Markle greet wellwishers on a walkabout as they arrive for an engagement at Nottingham Contemporary in Nottingham, central England, on December 1, 2017 which is hosting a Terrence Higgins Trust World AIDS Day charity fair. Prince Harry and Meghan Markle visited Nottingham in their first set of engagements together since announcing their engagement. / AFP PHOTO / Oli SCARFF (Photo credit should read OLI SCARFF/AFP/Getty Images)
LONDON, ENGLAND - NOVEMBER 27: Prince Harry and Meghan Markle attend an official photocall to announce their engagement at The Sunken Gardens at Kensington Palace on November 27, 2017 in London, England. Prince Harry and Meghan Markle have been a couple officially since November 2016 and are due to marry in Spring 2018. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - NOVEMBER 27: Prince Harry and Meghan Markle attend an official photocall to announce their engagement at The Sunken Gardens at Kensington Palace on November 27, 2017 in London, England. Prince Harry and Meghan Markle have been a couple officially since November 2016 and are due to marry in Spring 2018. (Photo by Karwai Tang/WireImage)
LONDON, UNITED KINGDOM - NOVEMBER 27: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince Harry and Meghan Markle attend an official photocall to announce their engagement at The Sunken Gardens, Kensington Palace on November 27, 2017 in London, England. Prince Harry and Meghan Markle have been a couple officially since November 2016 and are due to marry in Spring 2018. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 27: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince Harry and Meghan Markle attend an official photocall to announce their engagement at The Sunken Gardens, Kensington Palace on November 27, 2017 in London, England. Prince Harry and Meghan Markle have been a couple officially since November 2016 and are due to marry in Spring 2018. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, ENGLAND - NOVEMBER 27: Prince Harry and Meghan Markle during an official photocall to announce the engagement of Prince Harry and actress Meghan Markle at The Sunken Gardens at Kensington Palace on November 27, 2017 in London, England. Prince Harry and Meghan Markle have been a couple officially since November 2016 and are due to marry in Spring 2018. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - NOVEMBER 27: Prince Harry and Meghan Markle during an official photocall to announce the engagement of Prince Harry and actress Meghan Markle at The Sunken Gardens at Kensington Palace on November 27, 2017 in London, England. Prince Harry and Meghan Markle have been a couple officially since November 2016 and are due to marry in Spring 2018. (Photo by Chris Jackson/Getty Images)
TORONTO, ON - SEPTEMBER 30: Meghan Markle and Prince Harry are seen at the Closing Ceremony on day 8 of the Invictus Games Toronto 2017 at the Air Canada Centre on September 30, 2017 in Toronto, Canada. The Games use the power of sport to inspire recovery, support rehabilitation and generate a wider understanding and respect for the Armed Forces. (Photo by Karwai Tang/WireImage)
TORONTO, ON - SEPTEMBER 30: Meghan Markle and Prince Harry are seen on day 8 of the Invictus Games Toronto 2017 on September 30, 2017 in Toronto, Canada. The Games use the power of sport to inspire recovery, support rehabilitation and generate a wider understanding and respect for the Armed Forces. (Photo by Karwai Tang/WireImage)
TORONTO, ON - SEPTEMBER 25: Meghan Markle and Prince Harry attend the Wheelchair Tennis on day 3 of the Invictus Games Toronto 2017 at Nathan Philips Square on September 25, 2017 in Toronto, Canada. The Games use the power of sport to inspire recovery, support rehabilitation and generate a wider understanding and respect for the Armed Forces. (Photo by Karwai Tang/WireImage)
TORONTO, ON - SEPTEMBER 25: Meghan Markle and Prince Harry attend the Wheelchair Tennis on day 3 of the Invictus Games Toronto 2017 at Nathan Philips Square on September 25, 2017 in Toronto, Canada. The Games use the power of sport to inspire recovery, support rehabilitation and generate a wider understanding and respect for the Armed Forces. (Photo by Karwai Tang/WireImage)
TORONTO, ON - SEPTEMBER 25: Meghan Markle and Prince Harry attend wheelchair tennis on day 3 of the Invictus Games Toronto 2017 on September 25, 2017 in Toronto, Canada. The Games use the power of sport to inspire recovery, support rehabilitation and generate a wider understanding and respect for the Armed Forces. (Photo by Samir Hussein/Samir Hussein/WireImage)
TORONTO, ON - SEPTEMBER 25: Meghan Markle and Prince Harry attend wheelchair tennis on day 3 of the Invictus Games Toronto 2017 on September 25, 2017 in Toronto, Canada. The Games use the power of sport to inspire recovery, support rehabilitation and generate a wider understanding and respect for the Armed Forces. (Photo by Samir Hussein/WireImage)
TORONTO, ON - SEPTEMBER 25: Prince Harry (R) and Meghan Markle (L) attend a Wheelchair Tennis match during the Invictus Games 2017 at Nathan Philips Square on September 25, 2017 in Toronto, Canada (Photo by Chris Jackson/Getty Images for the Invictus Games Foundation )
TORONTO, ON - SEPTEMBER 25: Meghan Markle and Prince Harry attend the Wheelchair Tennis on day 3 of the Invictus Games Toronto 2017 at Nathan Philips Square on September 25, 2017 in Toronto, Canada. The Games use the power of sport to inspire recovery, support rehabilitation and generate a wider understanding and respect for the Armed Forces. (Photo by Karwai Tang/WireImage)
TORONTO, ON - SEPTEMBER 25: Prince Harry (R) and Meghan Markle (L) attend a Wheelchair Tennis match during the Invictus Games 2017 at Nathan Philips Square on September 25, 2017 in Toronto, Canada (Photo by Chris Jackson/Getty Images for the Invictus Games Foundation)
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Meghan gushed about her mother in a recent interview with Glamour"We can just have so much fun together, and yet, I'll still find so much solace in her support," she said. "That duality coexists the same way it would in a best friend."

While her mother and father will be there, a source tells ET that one of her Meghan's family members will not be getting an invite -- the 36-year-old actress' half-sister, Samantha Grant.

"Samantha is a wild card," the source says, also acknowledging the two have had a "strained" relationship in the past. "She has no filter and she’s not afraid of the repercussions of speaking her mind."

The source explains that Meghan is able to invite whomever she wishes, and the guest list will include most of her family members and friends.

On Thursday, Meghan and Harry released a series of intimate engagement photos!

When the couple announced the happy news, Meghan's parents issued a joint statement, saying, "We are incredibly happy for Meghan and Harry. Our daughter has always been a kind and loving person. To see her union with Harry, who shares the same qualities, is a source of great joy for us as parents. We wish them a lifetime of happiness and are very excited for their future together."

16 PHOTOS
The best style moments from the Royal Wedding
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The best style moments from the Royal Wedding
Kate Middleton waves back to an excited crowd as she enters the church. This was the first moment the world caught a glimpse at the stunning Sarah Burton for Alexander McQueen gown.
The backside that became famous. When Pippa Middleton stepped out behind her sister Kate, the world took notice of her perfectly shaped back side. Blogs, Facebook Pages and Twitter accounts were set up in its honor.
Kate looked just lovely as her father walked her down the aisle.
The Duchess's dress had an impressive, yet manageable, train, which Pippa tended to like a pro.
The happy couple could breathe a sigh of relief as they left Westminster Abbey -- it was now time for celebration.
Kate is simply gleaming following the ceremony while she's being taken with her new husband to the palace.
Um, hands down the best dressed of the day. How adorable are these kiddos?!
Queen Elizabeth II following the Royal Wedding is perfect in light yellow!
Prince Harry is no stranger to these types of high profile events, but he seemed to be really enjoying himself.
Kate's parents were impeccably dressed, with the Mother of the Bride simply glowing in pale blue.
Princess Beatrice of York and Princess Eugenie of York exit Westminster Abbey after the Royal Wedding showing off their intricate and detailed hats (which garnered plenty of attention).
Victoria Beckham arrives to attend the Royal Wedding wearing a navy dress with a matching small pill box hat.
Tara Palmer-Tomkinson arrives to attend the Royal Wedding wearing an intricate royal blue hat which matched her blue dress.
The first royal kiss occurred on the balcony of the palace, but the real moment occurred right below when the little flower girl pressed her hands against her ears -- clearly, she was not amused.
Kate's second dress -- for the evening festivities -- was just as stunning. We loved the sparkling belt!
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