The Falcon and the Winter Soldier actor is in a relationship with Spanish actress Alejandra Onieva since early 2020.

Their romance first hit the news when the couple shared PDAs on a yacht in Ibiza, Spain, in July 2020. Months after that, the duo was spotted strolling hand in hand in New York City with matching white tee shirts and surgical masks.

They also emerged out from the lockdown together in the December of the same year.

Although the couple relishes their bond, they have kept their public appearances to a minimum. They share no details of their relationship on their social media.

That being said, Onieva is the only one who has shared pictures with the Gossip Girl actor. But she, too, ensured not to reveal much. 

In July 2020, she shared a photo with Stan during their trip to Ibiza. She neither mentioned him nor tagged him on the picture, but left a sweet caption that read: "And these moments that life gives you #Sunset."

In another Instagram post, uploaded on December 7, 2020, Onieva thankfully tagged Stan in a picture that captured their shadows.

Sebastian Stan's Relationship History

Stan, 38, has dated several women from Hollywood. One of his first public relationships was with Leighton Meester. The duo starred together in CW's hit drama Gossip Girl, where Stan played the guest role of Carter Baizen and his ex-girlfriend portrayed Blair Waldorf.

They started dating in 2008, presumably after meeting in the series. The pair parted ways in 2010.

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Following the split, Meester married Adam Brody in 2014, and Stan started dating former Glee star Dianna Agron. Stan's new relationship lasted for months, starting in May 2011 and ending in December the same year. 

He then dated his Once Upon a Time co-star, Jennifer Morrison, in the summer of 2012. However, it ended almost one year later — in July 2013.

After three breakups, Sebastian dated Revenge actress Margarita Levieva. He met her in 2009 while filming the movie Spread, but didn’t start dating her until 2014. The actor even posted a picture with his girlfriend on his Instagram on March 2, 2015.

Sebastian Stan with his then-girlfriend, Margarita Levieva, on 2 March 2015 (Photo: Sebastian Stan’s Instagram)

But the duo parted ways without publicizing their split. 

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Fans Wanted His Character To Be In a Gay Relationship

In the Captain America series, the chemistry between Sebastian Stan ‘Bucky’ and Chris Evans ‘Steve Rogers’ garnered huge attention. So much so, the Marvel fans started a campaign on Twitter to make them boyfriends.

They started using #GiveCaptainAmericaABoyfriend to push Marvel to give the MCU its first gay relationship.

While the approach didn't come to fruition, Marvel introduced its first gay superhero character in a new series, What If...? Stan will reprise his role of Bucky in the show that is to debut in mid-2021 on Disney+.