While reports claim the 'True Detective' co-stars are smitten with one another, Kitsch refused to confirm or deny the speculation, rweported Female First.
"There is no record. There is nothing to set straight, she's an amazing actress and a great gal.
This comes after recent reports the couple fell for each other on the set of 'True Detective', with a source close to Rachel, 36, saying, "It hasn't been long. But it's serious."
"They grew closer on set," an insider said.
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He and McAdams were first spotted enjoying dinner at Osteria Mozza in West Hollywood, Los Angeles early last month.
"I don't know if it's full-blown love yet, but they talk constantly. They're really into each other. She talks about him all the time!" a source said.
The "Notebook" actress, who previously dated Ryan Gosling, was most recently linked to her "Southpaw" co-star Jake Gyllenhaal.