Singer Justin Timberlake and his wife Jessica Biel have welcomed their first child together, son Silas Randall Timberlake, their representative has confirmed.

The couple are "ecstatic" about the new arrival, but have decided to keep all other details about their son's birth private, reports people.com.

Timberlake, 34, had earlier announced Biel's pregnancy on Instagram by posting a photograph of him kissing her bump. "#BoyOrGirl #YouNeverKnow #WeDontEvenKnow (sic)," he captioned the image.

The star couple have been married since 2012.