Stephen Colbert brought back in-studio guests to “The Late Show” with a struggle.

That struggle being in the shape of arm wrestling John Krasinski.

Krasinski warned Colbert that he hasn’t arm wrestled anyone since he was 12.

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“I’m just looking at the guns and I’m like ‘hey man,'” Colbert said, referencing “The Quiet Place II” director’s arms.

“The key is you buy things at Baby Gap and people are like ‘you look huge,'” Krasinski joked.

After giving Krasinski some pointers, they were off.

Check out the clip above to see who won.

Krasinski also spoke about his new movie “A Quiet Place: Part II” and why it’s better to watch it in the theatre.

Plus, he took “The Colbert Questionert”:

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“A Quiet Place II” debuts in theatres on May 28.

“The Late Show With Stephen Colbert” airs weekdays at 11:35 p.m. on Global.