Amy - sister of Cole's Girls Aloud bandmate Kimberley Walsh - has been appearing as Mercedes McQueen's cousin Jenifique on the latest run of the after-dark spinoff show.
Writing on her Twitter page last night, Cole explained: "Just watched Amy Walsh on Hollyoaks Later.
"Finding it hard to wrap my head around her playing someone else but feel sooo proud of her!"
Jenifique's storyline has seen her catch up with the McQueens during Mercedes's hen celebrations in Ibiza. However, in a twist, she is dating the bride-to-be's first love Johnny - sparking a confusing time for Mercedes.
Hollyoaks Later airs all this week at 10pm on E4.
> Hollyoaks Later Amy Walsh: 'Kimberley is really supportive'
> Hollyoaks' new McQueen will cause trouble, promises Amy Walsh
> Hollyoaks Later Jennifer Metcalfe interview: Ibiza surprises for Mercedes
> Hollyoaks Later Jorgie Porter interview: Will Silas kill Theresa?
> Hollyoaks Later Miles Higson interview: Horror ahead for Seth Costello
> Hollyoaks Later Rachel Shenton interview: Mitzeee danger, romance and mischief
> Read more about the new series of Hollyoaks Later
Watch the official promo video for this year's Hollyoaks Later below: