The New York Post is reporting that the pair, who welcomed their first child on March 24, have named their child Rocket Zot Worthington.
Sources say “Zot” is the nickname of Sam’s father, Ronald Worthington.
The pair have remained quiet about the arrival of their little boy, who was born at Cedars-Sinai Hospital in Los Angeles.
The extremely private pair are thought to have married earlier in the year, with Lara changing her name to Lara Bingle Worthington on her social media accounts.
The pair have been dating since September 2013.