Blake Lively, Jimmy Fallon Match Wits on Harry Potter Knowledge, Other Topics

In her interview, the actress said it has been "torture" to see Ryan Reynolds' sex montage from 'Deadpool' playing on airplane screens.

A pregnant Blake Lively visited Jimmy Fallon on Monday to promote her film The Shallows and joined the Tonight Show host for a spirited game of "Know It All," a $100,000 Pyramid-like game in which contestants took turns listing words that would fall under various categories.

For the first category of the game, Lively chose "Harry Potter characters," and proved knowledgeable about J.K. Rowling's universe. When Fallon kept choosing the main characters, she called him out and goaded him to "do better ones" and eventually bested Fallon when he challenged her on "Hedwig."

In the next round Lively got flustered with the "Spanish words" category, and after her pick of "burrito" her time ran out. The laughs increased for the "four-letter words" category. Lively tried to explain why she used five-letter word "shoot" saying, "I'm not going to swear on television!"

Lively sat down with Fallon for an interview and talked about her recent awkward experience with in-flight entertainment. "Everywhere I look, every screen is my husband in a sex montage throughout the holidays with another woman, because everybody wants to watch Deadpool on the plane," she said, specifically calling out the sexual mashed potato scene in the film.

Lively said it's a "cruel and unusual form of torture" and things only get better when her daughter sees Reynolds on the screen and doesn't understand why he's not waving back at her because she thinks it's Facetime and not a movie.