"When Harry was in town it wasn't too crazy. There were maybe five paparazzi on the house, but they were discrete," the source notes. "There was additional security on the street, but even that wasn't too intrusive. It was pretty low key. Meghan and Harry never left the home. They just stayed indoors -- and that was before the snowfall."
Prince Harry and Meghan Markle
Prince Harry and Meghan Markle
File photos of Meghan Markle and Prince Harry, as Harry's girlfriend has been subject to a "wave of abuse and harassment" by the media, Kensington Palace has said in a statement.
NEW YORK, NY - JULY 14: Actress Meghan Markle enters the 'Today Show' taping at NBC Rockefeller Center Studios on July 14, 2016 in New York City. (Photo by Ray Tamarra/GC Images)
Prince Harry arrive at the London Eye on World Mental Health Day on October 10, 2016 in London, England.
(Danny Martindale/GC Images)
TORONTO, ON - JUNE 09: Actress Meghan Markle attends Luminato Big Bang Bash 2016 held at the Hearn Generating Station on June 9, 2016 in Toronto, Canada. (Photo by George Pimentel/WireImage)
NOTTINGHAM, ENGLAND - OCTOBER 26: Prince Harry plays rugby with children as part of the Coach Core sporting apprenticeships at National Ice Centre on November 6, 2016 in Nottingham, England. (Photo by Samir Hussein/WireImage)
Meghan Markle attends the Elton John AIDS Foundation's 13th Annual An Enduring Vision Benefit in New York October 28, 2014.
LONDON, ENGLAND - OCTOBER 07: Prince Harry takes part in sports activities during a visit to celebrate the expansion of Coach Core at Lord's Cricket Ground on October 7, 2016 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images)
NEW YORK, NY - APRIL 27: Actress Meghan Markle attends Glamour and L'Oreal Paris Celebrate 2016 College Women Of The Year at NoMad Hotel Rooftop on April 27, 2016 in New York City. (Photo by Nicholas Hunt/Getty Images for Glamour)
Britain's Prince Harry arrives at Lord's cricket ground in London on October 7, 2016, to participate in a Coach Core sports coaching apprenticeship programme event. Prince Harry, Patron, attended an event at Lord's Cricket Club to mark the expansion of the Coach Core sports coaching apprenticeship programme. The Prince met with apprentices, coaches and some of the partners and supporters who are taking the successful programme to 100 partners across the UK by Spring 2017. / AFP / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
TORONTO, ON - MAY 31: Actress Meghan Markle attends the Instagram Dinner held at the MARS Discovery District on May 31, 2016 in Toronto, Canada. (Photo by George Pimentel/WireImage)
Britain's Prince Harry attends the Metropolitan Police Service Annual Ceremony of Remembrance for colleagues who lost their lives in the line of duty, at the Metropolitan Police Training College in London, Britain October 20, 2016.
NEW YORK, NY - JULY 14: Actress Meghan Markle leaves the 'Today Show' taping at NBC Rockefeller Center Studios on July 14, 2016 in New York City. (Photo by Ray Tamarra/GC Images)
Actress Meghan Markle arrives on the red carpet for the MuchMusic Video Awards (MMVAs) in Toronto, June 16, 2013.
Prince Harry takes part in a training session during a celebration for the expansion of Coach Core at Lord's Cricket Ground on October 7, 2016 in London, England.
(Ben A. Pruchnie/Getty Images)
TORONTO, ON - APRIL 28: Actress Meghan Markle attends the Roland Mouret private dinner at Corkin Gallery on April 28, 2016 in Toronto, Canada. (Photo by GP Images/WireImage)
Actress Meghan Markle attends the USA Network and The Moth's Characters Unite Event at the Pacific Design Center in West Hollywood, California February 15, 2012.
Britain's Prince Harry arrives for the Sentebale Royal Salute Polo Cup in Wellington, Florida, U.S., May 4, 2016.
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"It's a quiet street, very residential," a neighbor also tells ET about Meghan's Toronto digs. "It's a safe neighborhood."
Meghan also appears to be pretty low-key when it comes to her everyday life. The avid cook has been spotted walking to nearby Loblaws grocery store -- Meghan memorably carried bags from Whole Foods to Kensington Palace when she visited Harry in London in November -- where she didn't call any attention to her appearance.
"She wasn't wearing makeup or had her hair done, just bundled up like everyone else," a Loblaws employee tells ET about one sighting of Meghan after the news broke of her relationship with Harry. "She walked home."
Aside from grocery shopping, the actress' regular routine includes yoga. Meghan frequently attends classes at a cozy studio in Toronto, which isn't as flashy and modern as other more high-end yoga studios.
"She goes to yoga often and seems to enjoy it," an eyewitness tells ET. "She's always smiling and happy when she leaves."
Still, Meghan isn't just a homebody -- she does enjoy her nights out with friends. Meghan's been photographed at the Four Seasons Hotel in the swankier neighborhood of Yorkville, and has been known to frequent members-only club, Soho House.
An industry source notes that Meghan has friends in high places in Canada.
"She's very gracious and has substance, but she isn't someone who wanted to just fly under the radar," the source says of Meghan. "She's best friends with Jessica Mulroney [the wife Ben Mulroney, the son of former prime minister Brian Mulroney], so she's already sort of aligned herself with Canadian royalty."
Earlier this week, Meghan and Jessica, a fashion stylist, were photographed shopping together in Toronto while bundled up for the snow.
Jessica also Instagrammed a cute pic of Meghan dancing with Jessica's daughter, Isabel, earlier this week. "LADIES NIGHT @meghanmarkle teaching one of her favorite little ladies to tap dance. Quite the weekend fête!" Jessica wrote.
Meanwhile, it appears Harry and Meghan's relationship is only heating up. On Wednesday, the couple was photographed out together for the first time, taking in the Christmas lights and a theater performance in central London.
RELATED: Funny Prince Harry moments:
Funny Prince Harry photos & moments
Funny Prince Harry photos & moments
Britain's Prince Harry (C) hands out cupcakes during a visit to the University of Canterbury's Student Volunteer Army in Christchurch on May 12, 2015. Prince Harry arrived in New Zealand on May 9 for a week-long visit. (Photo by Martin Hunter, AFP/Getty Images)
Prince Harry sits with pupils at Halfmoon Bay School in Oban as he leaves on May 11, 2015 in Stewart Island, New Zealand. Prince Harry is in New Zealand from May 9 through to May 16 attending events in Wellington, Invercargill, Stewart Island, Christchurch, Linton, Whanganui and Auckland. (Photo by Chris Jackson/Getty Images)
Prince Harry gets kissed by Royal Fan Victoria McRae during a walkabout outside the Sydney Opera House on May 7, 2015 in Sydney, Australia. Prince Harry is visiting Sydney following a month-long deployment with the Australian Army. (Photo by Chris Jackson/Getty Images)
In this Undated handout grab from video issued by Boultbee Flight Academy on Sunday April 5, 2015, Prince Harry flys in the back of a Spitfire on a sortie from Goodwood, West Sussex, via the Isle of Wight. The flight was to promote his Spitfire scholarship which offers training for wounded servicemen and women, flight training for the scholarship is delivered by Boultbee Flight Academy and supported by The Royal Foundation's Endeavour Fund. Prince Harry launched the scholarship selection in February 2014, the scholarship draws inspiration from the pilot Douglas Bader who flew throughout the Second World War with 20 individual aerial victories despite losing both his legs in 1931. (Photo by Andy R Annable/Boultbee Flight Academy/Getty Images) (NOTE TO EDITORS: The photographs shall be strictly for editorial use only. No charge should be made for the supply, release or publication of the photographs. There shall be no commercial use whatsoever of the photographs (including any use in merchandising, advertising or any other non-editorial use).
Prince Harry greets members of the public outside the Australian War Memorial on April 6, 2015 in Canberra, Australia. Prince Harry, or Captain Wales as he is known in the British Army, will end his military career with a month long secondment to the Australian Defence Force in barracks in Sydney, Perth and Darwin. (Photo by Lukas Coch - Pool/Getty Images)
Prince Harry listens to wildlife photographer Will Nicholls (not pictured) who uses the medium of wildlife photography to promote the conservation of red squirrels at Northumberland Wildlife Trust's Red Squirrel Northern England (RSNE) Project, where staff are working with the local community to safeguard the red squirrel (Sciurus vulgaris) population, with the main focus on a grey squirrel (Sciurus carolinensis) control programme at Frankham Woods on February 25, 2015 near Fourstones, United Kingdom. (Photo by Jason Friend /WPA Pool / Getty Images)
Prince Harry attends The Annual ICAP Charity Day at ICAP on December 3, 2014 in London, England. (Photo by Heathcliff O'Malley - WPA Pool /Getty Images)
Prince Harry cycles between venues on his Brompton Bike at Queen Elizabeth park on September 13, 2014 in London, England. The International sports event for 'wounded warriors', presented by Jaguar Land Rover was an idea developed by Prince Harry after he visited the Warrior Games in Colorado USA. The four day event has brought together thirteen teams from around the world to compete in nine events such as wheelchair basketball and sitting volleyball. (Photo by Chris Jackson/Getty Images)
Prince Harry is given a blow-up kangaroo by the Australian swimming team at the Aquatics Centre during the Invictus Games at Queen Elizabeth park on September 14, 2014 in London, England. The International sports event for 'wounded warriors', presented by Jaguar Land Rover was an idea developed by Prince Harry after he visited the Warrior Games in Colorado USA. The four day event has brought together thirteen teams from around the world to compete in nine events such as wheelchair basketball and sitting volleyball. (Photo by Chris Jackson/Getty Images)
Britain's Prince Harry (L) celebrates with Great Britain's David Henson after the latter won the 200m men ambulant IT2 race during the athletics event of the Invictus Games at Queen Elizabeth II Park in London on September 11, 2014. More than 400 wounded troops from 13 countries -- both serving and veter -- will go for gold across nine sports at Prince Harry's Invictus Games in London Between 10-14 September. AFP PHOTO/ADRIAN DENNIS (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
GLASGOW, SCOTLAND - JULY 29: Prince Harry plays a game during a visit to the Commonwealth Games Village on July 29, 2014 in Glasgow, Scotland. (Photo by Danny Lawson - WPA Pool / Getty Images)
SANTIAGO, CHILE - JUNE 27: Prince Harry blows a raspberry at a child as he visits kindergarten of indigenous children a on June 27, 2014 in Santiago, Chile. Prince Harry is on a three day tour of Chile after visiting Brazil. (Photo by Dan Charity - Pool/Getty Images)
Britain's Prince Harry (C, back), poses for pictures with residents of 'Cracolandia', one of Sao Paulo's poorest neighbourhoods where crack is omnipresent, during his visit to Brazil, on June 26, 2014. After Brazil, the prince will move on to the Chilean capital Santiago and the city of Valparaiso. AFP PHOTO / Miguel SCHINCARIOL (Photo credit should read Miguel Schincariol/AFP/Getty Images)
LONDON, ENGLAND - JUNE 14: Prince Harry, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge stand on the balcony during during Trooping the Colour - Queen Elizabeth II's Birthday Parade, at The Royal Horseguards on June 14, 2014 in London, England. (Photo by Chris Jackson/Getty Images)
ANTAEAYA, CHILE - JUNE 29: Prince Harry holds an albino African pygmy hedgehog during a visit to an outdoor centre on June 29, 2014 in Antaeaya, Chile. Prince Harry is on the final day of a three day tour of Chile after visiting Brazil. (Photo by Chris Jackson/Getty Images)
LONDON, ENGLAND - APRIL 04: HRH Prince Harry explores a new playground with a group of children from Gainsborough Primary school in Newham during an official visit to Queen Elizabeth Olympic Park with the Mayor of London, Boris Johnson on April 4, 2014 in London, England The park will open to the public on Saturday 5th April. (Photo by Chris Harris - WPA Pool /Getty Images)
KINGSTON, JAMAICA - MARCH 06: Prince Harry poses at the Usain Bolt Track at the University of the West Indies on March 6, 2012 in Kingston, Jamaica. Prince Harry is in Jamaica as part of a Diamond Jubilee Tour, representing Queen Elizabeth II, taking in Belize, the Bahamas, Jamaica and Brazil. (Photo by Chris Jackson/Getty Images)
Sandhurst, UNITED KINGDOM: Britain's Queen Elizabeth II (L) smiles with her grandson Prince Harry (4th R) during the Sovereign's Parade at the Royal Military Academy in Sandhurst, southern England, April 12, 2006. Officer Cadet H Wales as Prince Harry is known, will train to become a troop commander, in charge of 11 enlisted men and four light tanks -- a job that could soon see him on front-line duty in Iraq or Afghanistan. His grandmother Queen Elizabeth II, who turns 80 on April 21, and father Prince Charles both turned out for the passing-out ceremony where Harry and 218 other officer cadets in crisp blue uniforms, each carrying thin silver swords, received their commissions after 44 weeks of gruelling training.AFP PHOTO/Dylan Martinez/ Pool/REUTERS (Photo credit should read DYLAN MARTINEZ/AFP/Getty Images)
Britain's Prince Harry sits in the drivers seat of a Jaguar F-Type at the Goodwood Motor Circuit in Chichester, West Sussex, where he was attending a track day for the Royal Foundation Endeavour Fund. Harry met injured services personnel and joined them in driving classic cars before visiting the Boultbee Flight Academy. AFP PHOTO / POOL / STEFAN ROUSSEAU (Photo credit should read STEFAN ROUSSEAU/AFP/Getty Images)
LONDON, ENGLAND - JUNE 15: Prince Harry, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge stand on the balcony at Buckingham Palace during the annual Trooping the Colour Ceremony on June 15, 2013 in London, England. Today's ceremony which marks the Queens official birthday will not be attended by Prince Philip the Duke of Edinburgh as he recuperates from abdominal surgery and will also be The Duchess of Cambridge's last public engagement before her baby is due to be born next month. (Photo by Chris Jackson/Getty Images)