William Flanagan is best known for playing Joseph Brown on Coronation Street.
What some viewers may not know is his twin sister Isabelle plays Hope Stape - his cousin on the cobbles.
The siblings celebrated their 11th birthday this week, after appearing in several scenes together during the latest episodes as part of a big story-line involving Joseph.
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It seems talent must run in the family, with their 13 year old sister, Amelia Flanagan, playing April Windsor in Emmerdale.
Mum Rachel runs a Flanagan Instagram account, which documents what the family, who are from Leeds, gets up to away from TV sets.
The account has more than 11,000 followers, with fans regularly commenting on their "adorable" snaps and videos.
A photo posted on Friday morning shows William on set.
The youngster posed outside Rita's Kabin, next to the Weatherfield Gazette headline board.
Copying the figure on the board, William has his hand raised to his open mouth, while wearing his Corrie school uniform.
Captioning the post, his mum said: "Roll up Roll up! #corriesontonight @coronationstreet"
Fans have been quick to respond to the photo.
David Cunningham said: "A lovely lad well done son keep up the good work as Joseph"
li1ly123 said: "Adorable! Such a good actor too"
Coronation Street airs Monday, Wednesday and Friday on ITV and ITV Hub
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