Brenna O'Brien (born March 9, 1991) is a Canadian actress and artist.

O'Brien was in the original pilot of The Middle in 2007 also starring Ricki Lake and Atticus Shaffer.

O'Brien began her acting career at age 9, performing in local theatre productions and school plays.

Her first film role was in Scooby-Doo 2: Monsters Unleashed at the age of 12 and from there went on to guest star in such films and televisions shows such as Supernatural as the NSA demon secretary Cecily, Stargate SG-1, Meghan in Zixx: Level Two, X-Men: The Last Stand, Phantom Racer and Girl in Progress.

[1] She is an accomplished voice over actor, having worked as a guest star as well as lead roles in several anime series, including Inuyasha, Hamtaro, Gundam SEED Destiny,[citation needed] and Elemental Gelade.