Justin Theroux spent fiancee Jennifer Aniston's 45th birthday with Orlando Bloom in New York City Credit: Billy Farrell/BFAnyc/Sipa USA

Boys' night out! Justin Theroux couldn't be with fiancee Jennifer Aniston on her 45th birthday -- Tuesday, Feb. 11 -- so he spent the evening with pals instead. The Wanderlust actor, 42, joined fellow actor Orlando Bloom and other friends for a night on the town in New York City. See more photos of Justin and Orlando.

Dressed in matching head-to-toe black, Theroux and Bloom -- who split from wife Miranda Kerr last October -- hit up an event for the motorcycle club and clothing company Deth Killers of Bushwick, which was founded by Scott Campbell and Greg Minnig. Both stars were photographed trying out some cool-looking stunts on one of the brand's motorbikes, which had been rigged specifically for wheelies.

Earlier in the day, Theroux was spotted in costume as a cop for his upcoming HBO show The Leftovers. He also reportedly did some shopping -- perhaps for birthday gifts? -- at West Village perfume boutique Aedes de Venustas.

Aniston, meanwhile, has been busy with her own projects. On Monday, Feb. 10, she took part in the first-ever Makers Conference by interviewing iconic feminist Gloria Steinem. She was also announced as the star of a new movie, Cake, about a woman who becomes obsessed with the suicide of another woman in her chronic pain support group.