Scarlett Johansson & Colin Jost Make Red-Carpet Debut, Plus: Her Priceless Reaction to His Throwback Photo

Last night, Scarlett Johansson and Colin Jost made their first red-carpet appearance at the Hollywood premiere of her film “Avengers: Infinity War.”

“Extra's” Mario Lopez chatted with Scarlett, who commented that Colin “was somewhere floating around.” She joked, “Where did he come from? I just met him on the red carpet.”

A source told Us Weekly, “Their eyes lit up when they looked at each other.”

Earlier in the day, Scarlett made an appearance on “The Ellen DeGeneres Show,” where she gushed about Colin. She shared, “I guess I'm a Colin fan. He's not bad.”

When Ellen showed the 33-year-old a throwback photo of Colin in a wig and beard, Scarlett reacted by saying, “I mean, I can't unsee it now. Oh, my God, it is... wow.”

With a shocked look on her face, Scarlett added, “I can't say that that's an image that I'll ever forget.”

Scarlett and Colin went public with their romance in late November at the 2017 Museum Gala at the American Museum of Natural History.