Justin Theroux 'Happy' With Jennifer Aniston; Throws Actress Star-Studded Birthday Bash

Jennifer Aniston and Justin Theroux smile at American Cinematheque's 2011 Award Show Honoring Robert Downey Jr. at The Beverly Hilton Hotel in Beverly Hills on October 14, 2011 Jennifer Aniston and Justin Theroux smile at American Cinematheque's 2011 Award Show Honoring Robert Downey Jr. at The Beverly Hilton Hotel in Beverly Hills on October 14, 2011

Jennifer Aniston and Justin Theroux have remained fairly mum on their relationship, only offering up small details on their dating life, but the actor has opened up a bit about his superstar girlfriend.

“I understand the curiosity,” the actor, who is co-starring with Jennifer in “Wanderlust,” told New York magazine. “But other than saying I am happy, I am not going to indulge it.”

Adding, “That’s building your own torture device.”

He might not like to speak out about his 43-year-old ladylove, but according to Us Weekly, Justin was happy to help her celebrate her recent birthday over the weekend in Los Angeles.

According to the mag, the actor threw Jen a lavish bash in Hollywood with guests that included Courteney Cox, Chelsea Handler, Jimmy Kimmel, Ben Stiller, Emily Blunt and Jason Bateman.

“There was minimal decor with white hurricane candles lining the room and the balcony. A bar was set up inside along with a table where guests put presents,” a source told the mag, describing the party. “It was a cold night, but there were heaters on the patio. There were servers walking around with appetizers and jazz music playing.”

Jen reportedly wore a black sleeveless dress to her big night.

“She seemed very excited to see her friends, but she never got too far from Justin,” the source explained. “Every once in a while, Justin would come up from behind and give her a big hug and kiss. They would embrace and whisper to each other for a minute but then go back to socializing. She seemed very relaxed.”

Copyright 2014 by NBC Universal, Inc. All rights reserved.
This material may not be published, broadcast, rewritten or redistributed.