The actor, who has played paramedic Jeff Collier since 2007, will bow out on screen later this year.
Casualty's executive producer Oliver Kent commented: "Matt Bardock has given us one of Casualty's all-time favourite characters and we are sad to see him go.
"Jeff Collier has been an iconic action hero for seven years and we have been so lucky to have had him on our team for so long. We wish him all the very best for the future."
Bardock also addressed the news on his Twitter page this morning (June 30) after being flooded with messages from fans who were surprised by the news of his exit.
overwhelmed with the lovely comments.Thank you all so much for the love and support for jeff. It was a real gas for seven years. Xx
ā matt bardock (@mattbardock) June 30, 2014
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A new storyline for Jeff will begin on screen this weekend as he meets a new love interest named Samantha, played by former Coronation Street actress Michelle Collins.
Meanwhile, Bardock already has a new project lined up as he will be appearing in comedy play My Night With Reg at the Donmar Warehouse theatre in the West End between July 31 and September 27.
