Marvel's Elizabeth Olsen is engaged to Robbie Arnett from Milo Greene, after three years of dating.
A source told People that the couple (who were first seen together in March 2015) have decided to tie the knot.
Both stars are yet to personally confirm the news.
WATCH: Marvel's Scarlett Johansson and SNL's Colin Jost are engaged
Rumours had been swirling about their relationship since their romantic stroll around New York in March 2017.
The famous pair made their first official public appearance in September 2017 at the Gersh pre-Emmys party.
Robbie is the frontman for indie pop band Milo Greene, while Elizabeth played Scarlet Witch in a score of Marvel films, including Age of Ultron, Captain America and Infinity War.
The Endgame actress was previously engaged to Narcos actor Boyd Holbrook.
In 2014, the actors ended their engagement after three years of dating.
This is the second Marvel cast member to be engaged this year, with Avengers star Scarlett Johansson getting engaged to SNL's Colin Just in May.
Earlier this month, Scarlett flashed her engagement ring at Comic-Con during a Marvel Event.
Elizabeth is the younger sister of famous twins Mary-Kate and Ashley Olsen.
Like her sisters, the 30-year-old was a child star and featured in six of Mary-Kate and Ashley's productions.
Her breakout role was in the highly acclaimed 2011 thriller, Martha Marcy May Marlene.
Elizabeth's sister, Ashley, also recently sparked engagement rumours after being spotted with a band on her finger.
The 33-year-old was seen leaving a movie theatre with her artist boyfriend, Louis Eisner after viewing Once Upon a Time in Hollywood.
While Elizabeth has always remained private about her personal life, the famous actress told Modern Living in 2017 that she was open to the idea of motherhood.
"I was also thinking, ‘There’s this small room upstairs, which would be good for a kid,'" she told the publication.
Olsen added, “I don’t know where things will lead, but I do think about it in that way: ‘I think I could raise kids here.'”