In honor of Dudley Dursley's 35th birthday on June 23, J.K. Rowling took to fan site Pottermore to unveil new sections of "Deathly Hollows," the final book in the series, along with backstory on the Dursleys.
Watch this video to learn more about Pottermore:
For those of you in need of a refresher, Dudley Dursley is Harry Potter's plump, spoiled, and all around unfortunate cousin whose parents, Vernon and Petunia, take Harry into their home upon his parents' death.
In the Pottermore unveiling, Rowling offered insight into the Dursleys' stories. She told us the origin of their names and details about their relationship with James and Lily, Harry's late parents. When Petunia and Vernon got engaged, Petunia was worried about what Vernon would think of her sister, a Hogwarts witch at the time.
Upon the two couples' first interaction, Vernon attempted to patronize James for being a wizard. Of course, his efforts failed when James turned the jokes back on Vernon. The Dursleys eventually stormed out of the restaurant.
Rowling also wrote about Petunia's wedding drama, stating that "Petunia did not want Lily as a bridesmaid, because she was tired of being overshadowed." Talk about sibling rivalry. We can't be too harsh to Petunia, though. It must be tough growing up with a brilliant witch for a sister. However, the jealousy doesn't excuse Petunia and Vernon neglecting to show up to Lily and James' wedding.
The writer offered us a glimmer of insight as to why Vernon hates Harry so much throughout the series. She writes that Vernon's distaste for Harry "stems in part, like Severus Snape's, from Harry's close resemblance to the father they both so disliked."
Furthermore, Rowling revealed that she wanted Petunia to show a nicer side "when she said goodbye to Harry for the last time." However, this change of face did not seem fitting so Rowling had Petunia "behave in a way that is most consistent with her thoughts and feelings throughout the previous seven books."
Click through this slideshow to see pictures of Rowling alongside the movies' cast throughout the years:
Harry Potter - J.K. Rowling
J.K. Rowling reveals brand new 'Harry Potter' details on Pottermore
Author Joanne Rowling poses in a New York bookstore Oct. 17, 1998. Rowling, the author of "Harry Potter and the Sorcerer's Stone," has ridden to the top of bestseller lists in Britain and the United States with her engaging children's book about Potter, a bespeckled 11-year-old prodigy. (AP Photo/Suzanne Mapes)
WASHINGTON - APRIL 05: British author J.K. Rowling, creator of the Harry Potter fantasy series, points to the place on her forehead where her title character has a scar while reading 'Harry Potter and the Sorcerer's Stone' during the Easter Egg Roll on the South Lawn of the White House April 5, 2010 in Washington, DC. About 30,000 people are expected to attend attended the 132-year-old tradition of rolling colored eggs down the South Lawn of the White House. (Photo by Chip Somodevilla/Getty Images)
HARRY POTTER AND THE PHILOSOPHER'S STONE 2001 Warner Bros film with Emma Watson, Daniel Radcliffe and Rupert Grint
FILE - This Oct. 16, 2012 file photo shows author J.K. Rowling at an appearance to promote her latest book "The Casual Vacancy," at The David H. Koch Theater in New York. Harry Potter fans can look forward to a Halloween treat, with some tricks, from Rowling. In an announcement posted Friday, Oct. 24, 2014, on her web site, www.pottermore.com, the author revealed that she has prepared a 1,700 word story about the witch and former Hogwarts professor Dolores Umbridge. (Photo by Dan Hallman/Invision/AP, File)
J K Rowling attends the World Premiere of "Harry Potter and the Half-Blood Prince" at Leicester Square, London, 7th July 2009.
J K Rowling attends the World Premiere of Harry Potter and the Deathly Hallows Part 1, London, 11th November 2010.
FILE - In this Oct. 2, 2013 file photo, actor Daniel Radcliffe arrives at the premiere of the feature film "Kill Your Darlings" at the Writers Guild of America Theatre in Beverly Hills, Calif. Daniel Radcliffe is returning to Broadway as a disabled Irish dreamer. Producers said Thursday, Jan. 16, 2014 that the Harry Potter star will star in Martin McDonagh?s ?The Cripple of Inishmaan,? directed by Tony Award-winner Michael Grandage. (Photo by Dan Steinberg/Invision/AP, File)
Daniel Radcliffe, Emma Watson and Rupert Grint attends the World Premiere of Harry Potter and the Deathly Hallows Part 1, London
Harry Potter and the half blood prince london premier
Actors, from left, Daniel Radcliffe, Emma Watson and Rupert Grint attend the premiere of 'Harry Potter and the Deathly Hallows Part 1' at Alice Tully Hall on Monday, Nov. 15, 2010 in New York. (AP Photo/Evan Agostini)
ARCHIV - Der britische Schauspieler Daniel Radcliffe besucht am 7. Juli 2009 die Weltpremiere des Films 'Harry Potter und der Halbblutprinz' in einem Kino am Leicester Square in London. Der Film laeuft ab Donnestag, 16. Juli 2009, in den deutschen Kinos. (AP Photo/Joel Ryan) ** zu unserem KORR ** FILE - British actor Daniel Radcliffe arrives for the World Premiere of Harry Potter and the Half-Blood Prince, at a cinema in Leicester Square, central London, Tuesday, July 7 2009. (AP Photo/Joel Ryan)
In this film publicity image released by Warner Bros., Jim Broadbent stars as Professor Horace Slughorn, left, and Daniel Radcliffe stars as Harry Potter in "Harry Potter and the Half-Blood Prince." (AP Photo/Warner Bros., Jaap Buitendjik) ** NO SALES **
In this film publicity image released by Warner Bros., Daniel Radcliffe stars as Harry Potter in "Harry Potter and the Half-Blood Prince." (AP Photo/Warner Bros., Jaap Buitendjik) ** NO SALES **
In this film publicity image released by Warner Bros. Pictures, Ralph Fiennes portrays Lord Voldemort in a scene from "Harry Potter and the Deathly Hallows: Part 2." (AP Photo/Warner Bros. Pictures)
In this film publicity image released by Warner Bros. Pictures, from left, Emma Watson, Rupert Grint and Daniel Radcliffe are shown in a scene from "Harry Potter and the Deathly Hallows: Part 2." The movie pulled in $21.9 million to become the franchise's top-grossing chapter at $318.5 million domestically. (AP Photo/Warner Bros. Pictures, Jaap Buitendijk)
In this film publicity image released by Warner Bros. Pictures, Rupert Grint portrays Ron Weasley, left, and Helena Bonham Carter portrays Bellatrix Lestrange in a scene from "Harry Potter and the Deathly Hallows: Part 2." (AP Photo/Warner Bros. Pictures, Jaap Buitendijk)
In this film publicity image released by Warner Bros., Michael Gambon portrays Albus Dumbledore in "Harry Potter and the Half-Blood Prince." (AP Photo/Warner Bros., Jaap Buitendjik) ** NO SALES **
Harry Potter co-stars, from left, Robert Pattinson, Daniel Radcliffe, Jason Isaacs, Emma Watson, Ralph Fiennes, Rupert Grint, Miranda Richardson and Brendan Gleeson, pose for photographers at the United States premiere of the film Harry Potter and the Goblet of Fire, New York, Nov 12, 2005. (AP Photo/Stuart Ramson)
(from L) British actors Rupert Grint, Emma Watson and Daniel Radcliffe arrive at the world premiere of 'Harry Potter and the Half-Blood Prince' in Leicester Square in central London on July 7 2009. The film is the adaptation of the final book in the long-running series about the magical life of the young schoolboy. AFP PHOTO/Leon Neal (Photo credit should read Leon Neal/AFP/Getty Images)
LONDON - SEPTEMBER 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Actress Emma Watson attends the after party following the UK premiere of ''Driving Lessons,'' at Hedges and Butler on September 4, 2006 in London, England. (Photo by Dave M. Benett/Getty Images)
Emma Watson, who plays Hermione Grainger in the new movie "Harry Potter and the Sorcerer's Stone," arrives at New York's Ziegfeld Theatre, Sunday, Nov. 11, 2001, for the film's New York premiere. The movie opens in theaters nationwide on November 16. (AP Photo/Darla Khazei)
Daniel Radcliffe, right, who plays Harry Potter in the new film 'Harry Potter and the Philosophers Stone' stands before attending a news conference about the film with cast members Rupert Grint who plays Ron, left, and Emma Watson, center, who plays Hermione, at Knebworth House, near Stevenage, 35 miles north of London Tuesday Nov. 6, 2001. The film is to be screened for the general public on Nov.16, 2001. The film will be titled ``Harry Potter and the Sorcerer's Stone'' in the United States. (AP Photo/Adam Butler)
Emma Watson, Daniel Radcliffe, Rupert Grint (Photo by DMIPhoto/FilmMagic)
Actor Daniel Radcliffe at the N.Y. Premiere of 'Harry Potter and the Sorcerer's Stone' at the Ziegfeld Theatre in New York City. 11/11/2001. Photo: Evan Agostini/ImageDirect
Actor Rupert Grint at the N.Y. Premiere of 'Harry Potter and the Sorcerer's Stone' at the Ziegfeld Theatre in New York City. 11/11/2001. Photo: Evan Agostini/ImageDirect