The actor, who plays Jason Grimshaw in the ITV1 soap, took the reality TV star on a date to Alton Towers after meeting her in Marbella two months ago, according to The People.
A friend said: "It's nothing serious at the moment, they're both just enjoying each other's company and seeing how things go.
"Neither of them wants to rush into a serious relationship just yet so they're taking things steadily. But, having said that, I think Imogen is pretty smitten with him."
Ryan Thomas broke up with his former co-star Tina O'Brien last year.