Jennifer Aniston celebrated her 46th birthday last week by "bowling and playing games" with a group of A-listers including fiancé Justin Theroux and longtime pals Courteney Cox and Jimmy Kimmel.

According to US Weekly, Aniston rented out the Spare Room inside Hollywood's famed Roosevelt Hotel at a cost of at least $5,000 on Feb. 11, her birthday.

Also on hand for the low-key celebration were Molly McNearney, Emily Blunt, Sacha Baron Cohen, Tobey Maguire, Amy Adams, John Krasinski, Isla Fisher and Lake Bell.

Guests began arriving at around 9 p.m., and "everybody was pretty laid back" with areas also set up for them to play such games as backgammon, chess, monopoly, dominoes and cards, a source said.

Actress Reese Witherspoon was not present but was sure to give her pal a salute in spirit.

"All my love [heart emoji] to this lady on her b-day!!" she posted on Instagram. "Her light, grace & humor make the world (& ME) smile! #JenniferAniston #WCW #HappyBirthday"

Aniston and Theroux have been engaged since August 2012 and recently set a date for their nuptials, even though the intimate details remain a secret from the public, according to The Mirror.

"It's really happening," a source recently told reporters. "Jen is excited beyond belief. She says it will be the best day of her life. Neither of them wants a huge glitzy wedding"

The couple met in 2012 while on the set for the film "Wanderlust" and are said to have instantly hit it off. Aniston was previously married to fellow Hollywood A-list actor Brad Pitt.

The 43-year-old Theroux recently owned up to feeling growing public pressure to pop the question to Aniston.

"There is this hum of pressure -- I can't stress enough -- I just don't pay any attention to," he said. "We're just doing our own thing. We are completely happy, obviously, but we're not on anyone else's time-frame."