Kate Hudson, Lady Gaga Engaged?

That's what the rumors are: Kate Hudson is engaged (and pregnant) by her boyfriend, rock star Matt Bellamy, according to the U.K.'s Sun, and Lady Gaga may be engaged to her off-again-on-again boyfriend, bartender Luc Carl, according to the U.K.'s Daily Star.

Kate Hudson reportedly hosted a family party in a London hotel on Monday after the two had celebrated in Los Angeles. Matt Bellamy, 32, who is the frontman for the rock group Muse, is also reportedly expecting a child with Kate, 31. Kate and Matt started dating shortly after Matt split from Italian psychologist, Gaia Polloni, in December 2009. The soon-to-be-in-laws reportedly met over Christmas and Matt's parents even stayed with Kate's family, including her stepdad Kurt Russell, in Santa Monica, CA. No word yet on when the wedding will be.

And Lady Gaga is reportedly engaged to 29-year-old NYC bartender Luc Carl. She began dating Luc after meeting him at St. Jerome's, a bar where he was pouring drinks after he failed to make it in a heavy metal band, Omaha. That was before Gaga made it big. Since then, the two have been hot and cold, but over Christmas, apparently, things became more serious. Says one insider, "[Lady Gaga] could have paid for Luc and his family to stay in a five-star hotel at Christmas but thought it was way more romantic to stay with him in the bedroom he had as a little boy. He's the only man she’s truly loved."

Be that as it may, not everyone seems to be excited about their engagement. One inside friend said that while Luc may have been the "only one who has ever stood up to her," he also "didn't respect a single thing she was trying to do musically." The insider went on, "More than that, he would publicly put ehr down and even cheated on her at least once with a girl who was a regular at St Jerome's."

Friends believe they could wait to announce their engagement until right before the release of her new album, "Born This Way," on Feb. 13. Another source also said that the two are in no rush to set a wedding date. And added that Gaga doesn't "even have a proper ring because he couldn't afford one."

Images via PopOnThePop.com and Hello Magazine.