“Box of Lies” featured the host and the “Rhythm Section” star describing unusual items to each other and guessing whether they were telling the truth about them.
Lively used her “Deadpool” knowledge ― she is, after all, married to “Deadpool” star Ryan Reynolds ― to ferret out Fallon’s lies about an object made of “rock” in more ways than one.
Curious? Watch Lively dominate above.