VIDEO: 'Schmucks' Steve & Zach Fight Between Two Plants

Zach Galifianakis welcomed Dinner for Schmucks co-star Steve Carell onto his Between Two Ferns web series, but then quickly took back the welcome. Zach and Steve have a verbal brawl as they pick on each other's weights and nose lengths!

OK! GALLERY: STEVE CARELL — "THE OFFICE WILL CONTINUE"

In a new Funny or Die video, Steve and Zach try to have a typical interview between two ferns, but these co-stars are too competitive to keep it friendly!

Steve calls Zach fat and Zach makes fun of Steve's nose.

OK! VIDEO: STEVE CARELL DISCUSS DEPARTURE FROM THE OFFICE

WARNING: Some offensive language