The now-engaged couple was introduced when Jost, then in his first year at “Saturday Night Live,” wrote a sketch that Johansson, who was hosting the show for the first time, appeared in.

The sketch was a parody of MTV’s “My Super Sweet Sixteen,” writes Jost, 38, in his new memoir, “A Very Punchable Face.”

“She claims that she remembers thinking I was ‘cute’ but I know what I looked like and that’s not the word I would have used. (‘Shaggy’ would have been more generous. ‘Slovenly’ would have been more accurate),” he writes.

“I remember her being beautiful, smart, sweet, and intimidatingly sophisticated,” he continues. “And she had a grace and a smile that I’ve still never seen in any other human.”

The Staten Island native only briefly mentions his fiancée in the tome but does endearingly say, “I’ve met someone I love and who I feel more comfortable with than I ever have before.”

He also saves his final acknowledgment for the “Avengers” actress, writing, “Thank you to Scarlett for being my first reader and for always protecting me from my worst instincts. Remember that Mexican mask I tried to put in our living room? Thanks for stopping me from doing that.”

Last year, Jost and Johansson, 35, announced their engagement after quietly dating for two years. It will be the third marriage for the Oscar-nominated actress. She was previously wed to Ryan Reynolds and French ad exec Romain Duariac, with whom she shares a 5-year-old daughter, Rose.