Ben Stiller Says Jennifer Aniston & Justin Theroux "Seem to Be Really Happy Together"

Ben Stiller opened up at Monday's Tower Heist premiere in NYC about his good friends (and love birds!) Jen Aniston and Justin Theroux.

When asked why they're such a great couple, Ben told reporters, "They seem to be really happy together."

"Great people," he added. "Love them both."

His wife, Christine Taylor, chimed in and said, "They're just both very cool, terrific people."

The two couples have been seen on many NYC double dates this past fall including one at Italian restaurant Il Cantinori.

Ben also starred with Jen in Along Came Polly and worked with Justin on Tropic Thunder.