Is Mary-Kate Olsen engaged to her longtime boyfriend Nate Lowman? Of course, if you ask Star Magazine. And the proposal was just as cheesy and cliché as only a Star writer can come up with. Truffles. Rings. Classic dialogue. Including such memorable romantic proposal lines as, “Are you sure you want to do this?”

Mary-Kate Olsen and her artist beau, Nate Lowman, have been talking marriage for a while. Yet when he actually popped the question during the couple’s early October visit to Paris, the moment was sweeter than she could have imagined – and Star has all the details!

The setting was the restaurant at the Hotel Le Bristol, where the two were enjoying a four-course gourmet dinner. “At the end of the meal, Nate gave her a truffle box – she loves truffles, so she went to try one right away,” says a pal. “But inside, she found a little jewelry box instead. When she opened it, there was a beautiful diamond engagement ring!”

Mary-Kate’s reaction? “Nate’s this grungy, cool artist type, so she was shocked, but in a good way, by what was happening. Then he smiled and asked her to marry him and added, ‘Are you sure you want to do this?’ Mary-Kate said, ‘You know I want to do this!'”

After excitedly telling her best pals and sister Ashley – “She thinks Nate’s perfect for Mary-Kate,” says the friend – the megabcks babe, 23, has leapt into planning the wedding. “Their entire time in Paris was so romantic for both of them, and Mary-Kate was absolutely swept off her feet by Nate’s proposal. She’s so thrilled she can barely keep it quiet!”

[From Star, Nov. 2nd 2009, print ed.]

So basically Nate said, “Will you marry me?” then followed it up with “Are you sure you want to do this?” How romantic. Isn’t that what you say when you’re getting married for the wrong reasons? Like to save the relationship or because she’s knocked up? I’m not saying she is, I’m just saying that’s about the most unromantic question I can think of. Obviously I don’t believe for a second that Star got a perfectly-retold version of the story with completely accurate quotes. What I love is that their writer obviously filled it in with the way she thought it would go. Which involves wooing of the type most of us fantasized about around the age of eleven.

The print edition of the National Enquirer has an official “there’s no truth to any of this” denial from Mary-Kate’s rep. However the Enquirer (who I’m much more likely to believe than Star any day) also has a lengthy article about the prenup that’s supposedly being hammered out by Mary-Kate’s lawyers. They don’t even sensationalize it – they essentially say Nate understands that Mary-Kate has a $900 million fortune to protect, and he’ll sign a reasonably prenup. The only drama comes in from his friends supposedly telling him to hold out for a lot of money in case of divorce, their reasoning being “What’s $50 million to someone worth $900 million?” If there’s any truth to that, then Nate’s friends are morons. Speaking of which, if you want to have a look at some of Nate’s recent artwork, you can see pictures from the Maccarone Gallery in New York City here.

I doubt they’re actually engaged because Star’s story was clearly written by a fifth grader who’s read one too many Judy Blume novels. But I bet they’re working their way there, and will probably be engaged by the end of this year. Oh and I really don’t buy that Mary-Kate eats truffles. That’s the biggest tip-off, right there.

Here’s Nate and Mary-Kate at Paris Fashion Week on October 5th. Images thanks to WENN.com .