The actress appeared in one of the MCU's first films, 2011's 'Thor.'
Mackie put the rumors to rest when ET spoke with him at the 'Avengers: Endgame' premiere, which hits theaters April 26.
The actress has played Pepper Potts since the very first 'Iron Man' film back in 2008.
The actor also opened up about who his 6-year-old son's favorite Marvel heroes are, and revealed he's not at the top spot.
ET caught up with Linda on the red carpet at the 'Avengers: Endgame' premiere where she dished on her memories from set.
Elizabeth, who plays Scarlet Witch, opened up to ET at the premiere of 'Avengers: Endgame,' in theaters April 26.
Brolin opened up to ET about his Instagram strategy at the 'Avengers: Endgame' premiere, in theaters April 26.
The actor couldn't leak any spoilers -- even if he wanted to!
ET caught up with the actor on the red carpet at the premiere of his new film, 'Avengers: Endgame,' in theaters April 26.
The actress and her boyfriend, Colin Jost, shined at the star-studded premiere of 'Avengers: Endgame' in Los Angeles on Monday.
Paltrow said she's down to return to the MCU while speaking with ET at the 'Avengers: Endgame' premiere, in theaters April 26.
Pratt also revealed to ET he's not his son's favorite 'Avenger,' while at the premiere of 'Avengers: Endgame,' in theaters April 26.
Johansson joked around with ET at the premiere of 'Avengers: Endgame,' which is in theaters April 26.
The actress also shared how excited she was to finally get to see the completed film.
