Elizabeth Olsen is believed to have called time on her relationship with fiancé Boyd Holbrook after three years.
Olsen and Holbrook announced their engagement last March, but the actress has been spotted without her engagement ring, sparking rumours that the couple were no longer together.
Boyd - who is a model, actor and artist - was also seen appearing to confirm his single status while flirting with a mystery blonde woman at CAA's Pre-Golden Globes party at West Hollywood's Soho house earlier this month.
The 33-year-old star first began dating the 'Godzilla' actress in 2012 after they met on the set of their film 'Very Good Girls' - which also starred Dakota Fanning and Demi Moore.
The couple then got engaged last March - just two weeks after it was revealed Mary-Kate was planning to marry financier Oliver Sarkozy.
A source said at the time: "They've been by each other for a while, taking a lot of couple time."
An insider added of their engagement: "They moved into a place in Brooklyn a few months ago."
Elizabeth confessed previously that she was in no rush to get married and wanted to take the time to plan her perfect wedding.
She said: "I'm relaxed about it, but I am excited and planning ideas because it's fun - it's just like throwing a party to celebrate life. I love being in a relationship a lot."
The blonde beauty also admitted she was thinking about having children with her then-fiance.
She said at the time: "My mother would love it if I was in LA with kids. I loved growing up in LA, but I always think about places I've never been to before, like Oregon."
Tagged in Elizabeth Olsen