“I’m sick of holding my stomach in!" Sarah Harris is having another baby.

Studio 10 host Sarah Harris made a big announcement on air this morning – she’s pregnant with her second child.

The 35-year-old said she and husband Tom Ward, whose son Paul is just 17 months old, were surprised to discover their family would be growing to four a little sooner than they’d planned.

“I’m sick of holding my stomach in,” she told the Channel 10 audience. “I’m having another baby!”

“It was kind of a surprise! Because we were hoping to try again at the end of the year.  I’ve been pretty queasy and I’m nervous all of a sudden. And pretty tired. But I’m sort of coming through that part now.”

Rumours have been circulating about the journalist’s pregnancy for a while and she admitted she was over hiding her growing tummy behind her desk.

Baby number two is due in December.

Congratulations Sarah and Tom!

LISTEN: Here’s what she can expect in the first six weeks, although she probably already knows…