Kate Hudson's relationship with baseball hunk Alex Rodriguez is heating up - she's reportedly moved into the third baseman's New York apartment.

The You, Me and Dupree actress has been dating the Yankees ace - nicknamed A-Rod - since last November, but the pair only made the relationship public when they were spotted kissing in July.

They have since been pictured spending quality time together with their respective kids - Rodriguez's daughters Ella and Natasha, and Hudson's son Ryder - and the movie beauty has turned up at several Yankees games to show her support.

Now she is taking their relationship to the next level - by spending most of her time at Rodriguez's apartment, according to reports.

A source tells In Touch magazine, "Kate's always at his New York apartment, even on the days when he's on the road. She's made herself quite comfortable in his life. She's met his oldest daughter and her son likes Alex. Kate has become very serious about him."

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(This news article provided by World Entertainment News Network)