The actress, 25, who played Tee Taylor in the BBC show, announced the news earlier today on Instagram.
Sharing a snap of herself and her actor boyfriend Tom Leach at the Filmfest Bremen, Mia proudly showed off her growing bump.
The Dumping Ground star wowed in a tight brown dress and leather jacket.
She captioned the post: “Don’t think we can hide this much longer.
“We can’t wait to meet you baby 🤍🥹🤍.”
Many rushed to the comments section to congratulate the pair.
Tracy Beaker co-star Dani Harmer wrote: “eCongratulations 🥳💜.”
Emmerdale‘s Max Parker added: “Whaaaaaa! Congrats guys x.”
Hollyoaks’ James Sutton chimed in: “YES!!! Massive congrats you beautiful humans xxx.”
The happy couple announced their engagement last year.
Posting a pic of the pair kissing, Mia wrote: “When you see it…happiest girl in the world,” and a ring emoji.
The Tracy Beaker franchise isn’t the only thing that Mia has appeared in.
The star shot to fame when she was just 11-years-old when she took on the role of EastEnders’ Penny Branning.
She’s also appeared in Small Dark Places, BBC medical Drama Holby City, ITV’s Vera, Persuasian and The Witcher.
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