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In her first post-engagement interview, conducted by Chelsea Handler, Jennifer Aniston tears up talking about her fiance Justin Theroux.

RELATED: Jennifer Aniston Engaged to Justin Theroux

"I just got verklempt," Aniston, 43, says, wiping away tears.

"He's the greatest guy ever," Handler says of Theroux. "You guys make the greatest couple ever," she continues.

Theroux proposed on August 10, calling the engagement "an extraordinary [birthday] gift," as the actor-screenwriter turned 41 the same day.

You can see Jennifer's exclusive interview on Chelsea Lately tonight at 11/10c on E!.