The Time Traveler's Wife

Their winning lotto numbers include a 23.

Sunshine

"23 hours ago, while checking the comm systems..."

The Devil Inside

Isabella found the truth about her mother on May 23rd, 2009. Also, I believe Ben says he witnessed his first exorcism at 23.

My Week With Marilyn

Colin Clark is 23 in this movie. They even say it in the trailer.

Page 23

An upcoming movie. Thanks Brian for the heads up!

Pearl Jam 20

Eddie wears a 23 on his shirt when they are writing "Daughter", about 45 mins. in.

Thanks, JB!!

The Muppets

Almost 100% positive 80's Robot's licence plate started with 23. If anyone can confirm I will love you forever.