Today Extra star Sylvia Jeffreys and husband Peter Stefanovic share their joy at expecting their third child

Celebrity couple Sylvia Jeffreys and Peter Stefanovic are expecting their third child.

The Today Extra presenter, 40, and Stefanovic, 44, shared the exciting news on social media on Sunday morning, revealing their delight they would be welcoming a daughter after having two sons.

They shared a photo of themselves celebrating with their sons Oscar, six, and Henry, five, and captioned it with a joyful message.

'Oh baby... number 3 is on the way and the boys are already taking their big bro duties seriously. Swipe for the moment Oscar told us it's a GIRL!' Sylvia began.

'We hope she digs footy merch, because there'll be a lot of hand-me-downs. Jump on board, baby girl. It's fun here.'

Many of Sylvia's celebrity friends took to the comments section to offer their well wishes. 

'Amazing news Sylvia and Pete,' gushed fellow Channel Nine presenter Samantha Armytage.

'Yesss! Future netball mum incoming! This has made my day. So much love to you and Pete and the boys,' added Leila McKinnon.

'Oh my gosh what amazing news!!!! Congrats you guys,' Lauren Tomasi chipped in.'

Sylvia recently filled in as Today show co-host, as its current presenter Sarah Abo is on maternity leave. 

She and her News24 presenter husband tied the knot at the Ooralba Estate in Kangaroo Valley on April 1, 2017. 

In February 2020, Sylvia and Peter welcomed their first son, Oscar.

Just eight months later, the TV presenter revealed that she was pregnant with her second child. 

It follows reports that Tom Steinfort and Samantha Armytage look set to become the new hosts of the Today show after their stint on the breakfast program earlier this month led to a boost in ratings.

Channel Nine has been trialling hosts for the show since Karl Stefanovic - Sylvia's brother-in-law - left in June, following the fallout from his controversial interview with British far-right activist Tommy Robinson on his podcast.

And it seems they found the right fit in Steinfort, 41, and Armytage, 49, as they have helped lift ratings by an impressive 60,000 viewers.

The ten per cent ratings boost has seen Nine bosses eye the pair for permanent appointments, according to The Australian.

However, viewers will have to wait until August 24 for Armytage to take up the position as she is currently in Thailand on business.

Until then, Today Extra co-host Sylvia is manning the desk alongside Steinfort.