Chris Pratt, Anna Faris Ask Fans to "Mouth Kiss a Stranger" to Congratulate Them on Son's Birth

Chris Pratt and Anna Faris on February 26, 2012 in Hollywood, California. Credit: Steve Granitz/WireImage

Hopefully baby Jack will have his parents' sense of humor!

Anna Faris and husband Chris Pratt welcomed their first child Saturday, son Jack, Faris' rep confirmed to Us Weekly

Proud new dad Pratt, 33, tweeted Sunday, "It's a boy! Thanks for all your kind words." The Parks and Recreation actor jokingly added, "In lieu of gifts we ask that you mouth kiss a stranger."

Pratt and Dictator star Faris, 35, who married in 2009, will have to wait a little bit before they can bring their baby boy home.

"[Jack] arrived earlier than expected and will be spending some time in the NICU," Faris' rep explained to Us. "The happy parents thank you for your warm wishes and ask that you honor their privacy during this time."