It's an Office reunion! Stars John Krasinski, Jenna Fischer, Angela Kinsey, and Oscar Nunez met up in LA on Saturday to attend their costar Brian Baumgartner's wedding to girlfriend Celeste Ackelson. John arrived with his wife, Emily Blunt, and the pair shared a sweet laugh as they made their way into the party. Meanwhile, pregnant Jenna chatted with Angela, while Brian greeted guests, which included Gossip Girl alum Jessica Szohr. This is Brian's second marriage as he was previously wed to actress Julia Fisher. Congratulations to the happy couple!