Natalie Portman was there for one of the MCU's very first films, so it's only fitting that she returned for the Endgame.
The actress made a surprise appearance at the Los Angeles premiere of Avengers: Endgame on Monday, dazzling in a sleeveless black bodysuit with a bow-tie top and a high-waisted, embroidered black skirt with a floor-length slit.
Her presence on the carpet might have confused casual fans, as Portman has not appeared in a Marvel film since 2013. The actress starred as scientist Jane Foster, Thor's Earth-born love interest, in both Thor and Thor: The Dark World, but never crossed over to any of the ensemble flicks. (Unless this is a spoiler for a surprise Endgame cameo?!)
ET spoke with Portman's MCU co-star, Chris Hemsworth, on the carpet, who admitted that the emotions surrounding Endgame -- the culmination of 10 years and 22 films worth of origin stories and world-saving heroics -- had everyone feeling a little "nervous."
"It's always a nerve-wracking experience, but, I don't know, this was-- we literally left it all on the field with this one, and it was a combination of about 22 films, 10 years of work, and so I think we all have a sense of pride," he added. "It's a bittersweet quality to it, because this is the last time this gathering of this group of people is gonna be here together."