Annabelle Wallis and Sebastian Stan Debut Baby Bump!

and have made their first red carpet appearance together, after confirming they are expecting their first child together.

The actress, 41, showed off her bump in a daring backless gown as she and the Captain America star, 43, attended the Kering Women In Motion Awards at the .

Annabelle stunned in the revealing black sequinned dress which she teamed with thigh-high boots.

The couple have been together for four years, and in an interview last week, Sebastian confirmed he was set to become a father.

'I want to be a good dad,' he told Deadline. 'I’m feeling the responsibility of being a good father,' he said. 'And not to mention a good man. I’m 43 and I feel, in a lot of ways, I’m just starting to learn now. It’s just crazy to me.

Annabelle had previously debuted her bump while attending the 's Saint Laurent after party.

Sebastian and Annabelle were first romantically linked in 2022, and have kept their relationship relatively private.

Two years into their relationship, the couple started making red carpet appearances together, including the Cannes Film Festival and the Golden Globes in 2024 and 2025.

Stan recently gave rare insight into their relationship in their May 2025 cover story in Vanity Fair.

'I feel like it's really difficult nowadays to be able to have any privacy whatsoever,' he said before adding that their relationship 'is not something either of them discuss' publicly.

Stan explained that his personal life is 'the one part of my life that I try to keep somewhat for myself, even though it sort of ends up being out there.'

They were first seen in public in 2022 when they were seen spending time together at mutual friend Robert Pattinson's birthday party in New York City.

The actors kept a low profile until 2024, when they started attending public events together.

He brought her as his date for the premiere of A Different Man at the Berlin Film Festival in February 2024.

Three months later, they hit the red carpet at the Cannes Film Festival for his other project The Apprentice. In January 2025, the lovebirds hit the red carpet for the Golden Globes.

During the awards ceremony, Sebastian won his first ever Golden Globe. He received best performance by a leading actor in a musical or comedy film for the project A Different Man.

The Winter Soldier actor ended his speech with a sweet shoutout to Annabelle, saying: 'Annabelle, I love you.'