'Coronation Street' star Simon Gregson is expecting a baby with his wife Emma Gleave.

Simon Gregson and Emma Gleave (Twitter)

Simon Gregson and Emma Gleave (Twitter)

The 40-year-old actor, who plays the part of Steve McDonald in the ITV soap, confirmed the news on Twitter by posting a picture of himself holding a beer stood alongside his wife with the word 'baby' appearing on her stomach.

Simon captioned the image: "After a stressful few months....myself and @emmagleave are excited to announce..... (sic)"

The duo, who tied the knot in 2010, already have two children together - seven-year-old Alfie and five-year-old Harry.

Brooke Vincent, who stars as Sophie Webster on the show, was among the first to extend her congratulations to her co-star and his wife.

She tweeted: "I'll drink for you Em don't worry!! (sic)"

Beverley Callard, who stars as Simon's character's on-screen mother Liz McDonald on the soap, wrote: "Oh so thrilled.'

Meanwhile, Samia Ghadie - who plays Maria Connor on 'Coronation Street' and is currently pregnant with her first child with boyfriend Sylvain Longchambon's - also congratulated her co-star.

She wrote: "aw brilliant!! So happy for u monkeys! #babyboom xxx. (sic)"

Simon made his first 'Coronation Street' appearance in 1989 and is among the longest-serving members of the current cast.