Heard and van Ree started dating in 2008, with the Justice League star even legally changing her name to Amber van Ree that year. The two eventually broke up in 2012, one year after Heard met Johnny Depp while filming The Rum Diary, but have remained on good terms ever since.
Heard divorced Depp in 2016, and has since moved on with Elon Musk.
"Elon is very attentive to Amber, which is something she looks for in a partner," a source told ET of the pair's relationship in April, adding that their romance developed over time.
See more in the video above.
PHOTOS: See Amber and Tasya through the years
Amber Heard and Tasya Van Ree
Amber Heard and Tasya Van Ree
Amber Heard and Tasya Van Ree attend Tasya Van Ree's private viewing of 'Distorted Delicacies' at Vs. Magazine & Creative Studios Paris' Space on June 22, 2011 in New York City.
CENTURY CITY, CA - MAY 19: Actress Amber Heard (R) and Tasya van Ree attend the 'Beauty Culture' exhibition opening reception at Annenberg Space For Photography on May 19, 2011 in Century City, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - NOVEMBER 08: Amber Heard and Tasya Van Ree attend Stephen Webster Hosts Tasya Van Ree 'Replica' Exhibition on November 8, 2012 in Los Angeles, California. (Photo by Stefanie Keenan/WireImage)
NEW YORK, NY - MAY 17: Actress Amber Heard (L) and Tasya Van Ree leave their Midtown Manhattan hotel on May 17, 2011 in New York City. (Photo by Ray Tamarra/Getty Images)
BEVERLY HILLS, CA - JANUARY 16: (L-R) Kristen Bell, Tasya van Ree and Amber Heard attend the InStyle and Warner Bros. 68th annual Golden Globe awards post-party at The Beverly Hilton hotel on January 16, 2011 in Beverly Hills, California. (Photo by John Shearer/Getty Images)
WEST HOLLYWOOD, CA - DECEMBER 17: Photographer Tasya van Ree (L) and Amber Heard attend a special screening of 'And Soon The Darkness' held at Laemmle Sunset 5 Theatre on December 17, 2010 in West Hollywood, California. (Photo by Michael Tran/WireImage)
Tasya Van Ree and Amber Heard are seen on November 4, 2010 in Los Angeles, California. (Photo by Jean Baptiste Lacroix/WireImage)
NEW YORK - NOVEMBER 16: Amber Heard and Tasya Van Ree attend the Society of Sloane-Kettering Cancer Center's 2010 fall party at Four Seasons Restaurant on November 16, 2010 in New York City. (Photo by Donna Ward/Getty Images)
***EXCLUSIVE*** Artist Tasya van Ree (L) and Amber Heard attend 2011 Los Angeles Comikaze Expo kick-off party at the Celebrity Vault on December 15, 2010 in Beverly Hills, California. ***Exclusive*** (Photo by Brian To/FilmMagic)
LOS ANGELES, CA - AUGUST 19: Actress Amber Heard (L) holds a protest sign with her girlfriend Tasya Van Ree (R) during a same-sex marriage advocates demonstration against the stay barring gay marriages on August 19, 2010 in Los Angeles, California. On August 4, District Judge Vaughn Walker ruled against Proposition 8 as unconstitutional, and after his ruling the U.S. Ninth Circuit Court of Appeals granted proponents of Proposition 8 a stay on August 16. (Photo by Kevork Djansezian/Getty Images)