Jennifer Aniston's Dad: Justin Theroux Is a "Charming Young Man"

Credit: Eric Charbonneau/; Todd Williamson/

Justin Theroux got the thumbs up from the guy who matters most: Jennifer Aniston's dad!

Days of Our Lives actor John Aniston turned up at Sunday's Loukoumi's Celebrity Cookbook launch (his cinnamon toast recipe is included) at L.A.'s Treehouse Social Club -- and dished just a tad on his very famous daughter's latest man.

"He's a charming young man," the soap veteran, 78, told Us Weekly of Theroux, 40. Aniston, 42, and her Wanderlust costar have been dating since the spring, and now live together in NYC and L.A.

"I think they make a wonderful couple," her dad added, explaining that he and his wife "get together whenever we can" with the cute couple.

Tell Us: Do you think Aniston and Theroux could go the distance?