If there’s one colour Scarlett Johansson knows how to wear, it’s the shade she shares her name with.

On Thursday night, she proved that once more by stepping out in a stunning red cocktail dress with matching lipstick and a manicure, to attend the London premiere of Captain America: The Winter soldier.

But there was no sign of the actress’s baby bump just yet having announced this month that she was expecting her first child.

She’s more Scarlet Witch than Black Widow: Scarlett Johansson stuns in red at the Captain America: The Winter Soldier premiere in London

No sign just yet: The pregnant actress didn’t show much of a baby bump on the blue carpet

Glowing: The mother-to-be still looked every bit the screen siren as she promoted the latest Marvel movie in which she reprises her role as Black Widow

Scarlett is having a baby with her French fiancé Romain Dauriac, but she was flying solo on Thursday to promote the Marvel sequel in which she reprises her role as S.H.I.E.L.D agent Natasha Romanoff AKA Black Widow.

At a press conference earlier in the day, Scarlett said she felt ‘forever wounded’ after suffering various injuries as a result of her action movie roles.

Having slipped back into a slinky catsuit of Black Widow, for the third time Johansson admitted she has been suffering bumps and bruises ever since her first appearance as the former KGB agent in 2010’s Iron Man 2.

The Captain himself: Chris Evans poses with pregnant Scarlett at the Vue Westfield in Shepherd’s Bush

All about the red: Scarlett matched her dress to her lips and manicure, with a diamond necklace to really set off the outfit

Mother-to-be: Scarlett is having a baby with her French fiancé Romain Dauriac

Lucky fans: Some members of the public had Captain America shields for Scarlett to sign

Chat: Alex Zane (left) and Scarlett Johansson during the Captain America: The Winter Soldier Premiere at the Vue Cinema

They look good together: The beautiful actress and handsome actor certainly made a cute couple

Avengers Assemble: Both Scarlett and Chris fought together in character in the first Marvel film revolving around the six superheroes of comic legend

The cast: Sebastian Stan, Jenny Agutter, Anthony Mackie, Chris Evans, Scarlett Johansson, Samuel L Jackson and Harley Atwell