Sophia Bush & Austin Nichols: Katy & Russell for Halloween!

Sophia Bush arrives at The Grove in L.A. to film an interview for Extra with host Mario Lopez on Monday (November 1).

Over the weekend, the 28-year-old One Tree Hill actress and boyfriend Austin Nichols dressed up as Katy Perry and Russell Brand for Halloween!

The couple attended Maroon 5‘s Exclusive Halloween Party at the Hollywood Forever Cemetery.

Adam Levine went as Die Hard‘s John McClane while his girlfriend, Anne Vyalitsyna, wore a Hooter’s waitress outfit.

Also at the Bacardi-hosted bash: Mischa Barton (as an Indian), Isabel Lucas, Kirsten Dunst (’60s flower power girl), Rose McGowan (Marie Antoinette), and Aziz Ansari (Thomas the Tank).

10+ pictures inside of Sophia Bush at The Grove and Maroon 5‘s Halloween party…