The baby will join big sister Sadie, who was born in December 2013, a year after Jesse and Aryn married, reported Ace Showbiz.
Jesse met Aryn when he was still working as a school teacher in New York City. The actor exchanged wedding vows with his real-estate broker girlfriend in Los Angeles on September 1, 2012 after five years of dating.
Jesse is known for his role as Dr. Jackson Avery on ABC's medical series "Grey's Anatomy". He also starred on "Law & Order" and "Greek".