Cold Case Wiki
Baumann in 2018
Aviva Baumann
Full Name Aviva Farber-Baumann
Date of Birth July 10, 1984
Place of Birth Santa Fe, New Mexico
Status Active
Character played Celeste Church (1997) (Episode Stand Up And Holler)

Aviva Baumann (née Farber; born July 10, 1984) is an American actress known best for her role as Nicola in the Judd Apatow and Seth Rogen comedy, Superbad, as young Shannon Gibbs, the first wife of Special Agent Leroy Jethro Gibbs, in flashbacks on the US TV drama NCIS; and as Mandy, the much younger girlfriend of Ken Marino on Party Down. She is of Jewish decent and married to her co-actor Ken Baumann.

Aviva was 22 at the time of the episode "Stand Up and Holler"'s production. She portrayed a young Celeste Church in 1997, the best friend of victim Rainey Karlsen (portrayed by Whitney Able) who was also identified as an accomplice in Rainey's death.