The pair, sitting on opposite panels on Nick Grimshaw's BBC3 show, flirt up a storm during filming.
Grimmy says: "You told our researcher that Helen Flanagan is your dream woman, didn't you?"
And though James is a bit embarrassed, muttering that he thought the researcher wouldn't make his admission public knowledge, Helen is thrilled.
She says: "James, I am so flattered, genuinely."
The actress, 23, then proceeds to mock-up a situation where she pretends to be James' girlfriend and makes him a celery soup... As you do.
Helen's been single since she split with footballer Scott Sinclair over the summer, and James isn't in a relationship either.
According to The Sun, one insider said: "There were lots of flirty looks throughout the show and you could sense the chemistry. During a break in filming, James was overheard asking Helen for her phone number.
"After the show she was seen going to find him in his dressing room."
Blimey! James, 25, only recently grumbled: "A lot of attractive women are d***heads."
Let's hope he doesn't feel that way about Helen, because this duo would make the cutest couple!
Catch Sweat the Small Stuff on BBC3 at 10pm tonight.
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