Justin Theroux  Jennifer Aniston suit dress ben stiller tuxedo red carpet aniston111512_05_X17WM460.jpg

Jennifer Aniston and her equally sexy fiance Justin Theroux both looked stunning while walking the red carpet together at the 26th American Cinematheque Award Gala in Beverly Hills.

The couple, who got engaged over the summer, are clearly so in love!

Just yesterday, we snapped the lovebirds cruising around Beverly Hills in her new Porsche Panamera sports car ... with Justin behind the wheel.

We can already envision how gorgeous their wedding photo is going to turn out.

See who else attended the awards gala, honoring actor Ben Stiller, in our gallery below.