It was the first appearance for the The Morning star, who got her break presenting children's shows Toonattik and Action Stations! on CITV, since announcing her pregnancy earlier this month.
She shared the happy news in a video post on her Instagram account, writing alongside, 'Really chuffed to tell you that I'm expecting a little baby. Phew....it's been a rough 12 weeks trying to keep it schtuum!'
'Very happy although as I'm finding out already, pregnancy and #anxiety is a whole new ball game! I'm going to be shedding some light on it, and of course my usual videos over the coming months #anxietybusting #babynews.'
Anna couldn't contain her excitement as she smiled for the photographers
The 34-year old attended the European premiere of The Jungle Book with her husband, fitness guru Alex Di Pasquale, whom she married in 2015.
Writing in a post on her blog at the time, Anna said 'I can’t believe it… me… marriage… yep it’s really happening.'
'This October I’m embarking on the next stage of my life and after 34 years, am changing from a ‘Miss’ to a ‘Mrs' gulp]'
'After what has been a whirlwind engagement (after a very heartfelt proposal), my Mr and I are to get hitched at my family village church in Hertfordshire, surrounded by our nearest and dearest, in what will be a small, yet (I hope) perfect day.'
Anna with husband Alex, whom she married in 2015
Anna, who has also worked on GMTV and ITV's Daybreak before landing her current role as an agony aunt on This Morning, posed for photographers with Alex whilst holding her growing tummy.
However, she later admitted to fans on her Instagram account that she was actually trying to hold her bump in!
'Trying to hold the burgeoning bump in!! Loved #junglebook great movie and adaptation of the Disney classic #premiere #Showbiz #datenight', she captioned a picture of the pair from the night.
Really chuffed to tell you that I'm expecting a little baby ðŸ‘¶ðŸŽ‰ phew....it's been a rough 12 weeks trying to keep it schtuum. Very happy although as I'm finding out already, pregnancy and #anxiety is a whole new ball game! I'm going to be shedding some light on it, and of course my usual videos over the coming months ðŸ’‹ #anxietybusting #babynews
Anna announced her pregnancy in a video post earlier this month