Justin Timberlake and Jessica Biel are "both so excited" to become parents.

Jessica Biel and Justin Timberlake

Jessica Biel and Justin Timberlake

The 'Total Recall' actress, who married the 'SexyBack' hitmaker in Italy in 2012, is set to give birth to their first child in "late March or early April" and the couple plan to take some time off to bond with their baby.

A source said: "They are both so excited for this new chapter and ready to be parents. They are such a great team and will both be very hands on and involved with everything."

The duo are making the most of their final few weeks alone and the actress' best friend Estee Stanley threw her a dinner party to celebrate her 33rd birthday at her home in Los Angeles yesterday (03.03.15).

An insider told E! News that they enjoyed a very mellow meal with under 10 of Jessica's closest friends.

The couple were spotted leaving the bash at 11.30pm with big smiles and Justin carried several gifts.

Jessica completed filming her upcoming movie, 'The Devil and the Deep Blue Sea,' in New Orleans late last week and refused to let her pregnancy slow her down on the set.

A source recently said: "She's very pregnant but she's really been a good sport. She's working long days with 5 a.m. call times and doesn't complain at all. She doesn't seem to be uncomfortable.

"She's very low-maintenance and hasn't required anything extra at all. She is the opposite of a diva."