Stephen Colbert And Anna Kendrick Sing A Duet That'll Melt Your Heart

They say the quickest way to someone's heart is through their stomach, but in this case it's right through Mordor.

Anna Kendrick and Stephen Colbert bonded over "Lord of the Rings" when she stopped by the show on Thursday, and who hasn't had a conversation about Middle-earth that didn't end in some singing, right?

After the pair became BFFs, Colbert convinced the "Pitch Perfect " star, who appeared on Broadway when she was 12, to sing a duet of "They Say It's Wonderful" from "Annie Get Your Gun ." The moment happens toward the end of the video, and it's pretty wonderful.

"The Late Show" airs weeknights at 11:35 p.m. ET on CBS.