The holy days of Easter and Passover are upon us, calling for the observant to drop what they're doing and get themselves to their local house of worship.

Celebrities may not be thought of as particularly religious people, but some have been quite open about their upbringings, which often included holy day observances.

Some certainly took the time to crack a joke or two via their Twitter accounts.

Funny lady Fran Drescher tweeted the following: Zeezum Pesach! Chag Same'ach! Happy Passover! Brad Pitt is not invited to seder because nothing can get turned on after sundown.

Mayim Bialik of The Big Bang Theory also tweeted for Passover: good evening israel and that side of the world: chag sameach! next year in jerusalem!?

Bialik and Drescher are not alone. Here are celebrities we might see at a Passover seder or at church on Sunday.

Stephen Colbert
Funny man Stephen Colbert is Catholic. "I love my church, and I'm a Catholic who was raised by intellectuals, who were very devout," he told Time Out magazine, according to a Washington Post report. "I was raised to believe that you could question the church and still be a Catholic." Reuters
Harry Connick Jr.
Harry Connick Jr. is Catholic. "I'm a practicing Catholic, but I don't necessarily think it's something people want to hear me talk about," he told Christianity Today. "But if I'm asked about it, I'll talk about it." Reuters
Fran Drescher
Fran Drescher recently tweeted the following: "Zeezum Pesach! Chag Same'ach! Happy Passover! Brad Pitt is not invited to seder because nothing can get turned on after sundown." Reuters
Mel Gibson
The controversial Mel Gibson was raised Catholic. He's made many an interesting comment -- and at least one movie, "The Passion of the Christ" -- on religious matters. Reuters
Nicole Kidman
$9.6 million as of 2010 Reuters
Adriana Lima
Adriana Lima told GQ in 2006 that she was Catholic, went to church every Sunday, and was waiting until marriage to have sex. Reuters
Natalie Portman
Portman regretted going nude on film after the footage ended up on porn sites. Reuters
Seth Rogen
Seth Rogen has a new project up his sleeve and it's pretty gory. Reuters
Adam Sandler
Adam Sandler wed his wife in 2003 in a Jewish ceremony, according to a People report. Reuters
Maria Shriver
Maria Shriver married Arnold Schwarzenegger in a Catholic church. Reuters
Jessica Simpson
Jessica Simpson comes from a religious family and started singing in her Baptist church. Reuters
Mark Wahlberg
Mark Wahlberg may star in the next "Transformers" movie. Reuters
Brad Pitt Israel Twitter Passover