The couple have become parents for the second time

Jessica Simpson and fiancé Eric Johnson are celebrating the birth of their baby son.

The singer, 32, and NFL star Eric, 33 – who are already parents to daughter Maxwell – welcomed the little boy yesterday after Jessica underwent a scheduled C-section.

Ace Knute (pronounced Ka-nute) Johnson has arrived! Mom and baby are doing great,’ a representative tells Us Weekly.

Jessica, Eric and Maxwell are thrilled to welcome the new addition to their family.’

Ace‘s unusual middle name is in honour of Eric‘s Swedish paternal grandfather Knute Johnson.

Blonde star Jessica let the sex of her second baby slip to American TV presenter Jimmy Kimmel in March when she said she ‘never knew a wiener could make her nauseous’.

‘Accidental announcement tonight on @jimmykimmel !’ she later Tweeted.

SEE PICTURES Jessica Simpson and Eric Johnson in BABY JOY! Celebrity babies born to star parents in 2013

SEE PICTURES Jessica Simpson and Eric Johnson have fun at the launch of her new range Girls at Dylan’s Candy Bar in New York

SEE PICTURES Jessica Simpson at Us Weekly‘s Hot Hollywood Style party

Anna Duff