Owen & Kate's Romantic Birthday Date in Miami:

Kate Hudson had some romantic company for her 29th birthday on Saturday, as she celebrated her big day with Owen Wilson in Miami.

Hudson joined Wilson, 39, and his parents for a lunch at Lario's on South Beach Saturday afternoon. "The four of them sat away from the crowds and had a blast," says a source at the restaurant, which is owned by Gloria Estefan and her husband Emilio Estefan, Jr. "Kate and Owen looked very happy and were talking up a storm to Owen's parents."

Following their meal? A birthday cake of course! "They asked for a tres leches butter cake soaked in milk with a candle in the middle," says the source.

By nightfall, Hudson – who came to Miami on a break from shooting Bride Wars in Boston – stepped out with Wilson and some of Kate's girlfriends, as they kept the party going with dinner at Ago at the Shore Club. The lovebirds then walked hand-in-hand to Skybar at the Shore Club, where they lounged and partied poolside on a bed. The pair chatted with each other, shared kisses and "were very sweet looking, it was super lovey-dovey," according to one onlooker.

Wilson remains in Florida shooting Marley & Me with Jennifer Aniston and Eric Dane.

Kate Hudson Is PEOPLE's Most Beautiful Cover Girl:

Heading the list of PEOPLE's 100 Most Beautiful People is a 29-year-old mother remarkably short on her beauty sleep – for which she lovingly credits her active 4-year-old son.

The beautiful, sleep-deprived mom? Kate Hudson, PEOPLE reveals in its special issue, which goes on sale Friday.

Was she always such a head-turner? Admits the actress: "I was a tomboy. I had three brothers. I was the girl with the dress on that always came back in the house filthy with scrapes and bruises. But I was always very girly. I had to be able to twirl so that my underwear showed."

Her best time for looking good, she says, comes "at the end of the night, when everything's soaked in and I'm still up. I like the leftover makeup in the morning. You've got to wash your face but there's always the leftover eye makeup, I love that."

(See Photos: Get a sneak peek of the 100 Most Beautiful)

For other aspects to Hudson – including her favorite body part, losing her pregnancy weight and what she has to say about Owen Wilson – as well as the other 99 beautiful people who made this year's cut, pick up the new issue of PEOPLE, on newsstands Friday.

Kate Hudson & Owen Wilson Call It Quits

Despite a flurry of engagement rumors, Kate Hudson and Owen Wilson – Hollywood's most notorious on-again, off-again couple – have called it quits, less than two months after rekindling their romance in Miami.

The end of their erratic courtship (they began dating in September '06) comes amid erroneous reports that the pair were engaged, fueled by photos of Hudson wearing a Tiffany & Co. ring (it was a prop!) both on-and-off set of her film Bride Wars, which she's filming in Boston.

"It was a pretty bad breakup," says a Wilson pal. "Owen said it was a tough one. He definitely doesn't want to dwell on it. He wants to put it behind him."

Since the split, Hudson, 29, and Wilson, 39, have each been spotted letting loose. On May 9, Hudson and Bride Wars costar Steve Howey, 30, visited Boston's Liberty Hotel bar, Alibi. And on May 11, Wilson dropped by N.Y.C.'s Upstairs with two women.

"He was pretty chummy with the ladies ... he was certainly doing some sweet talking," according to an onlooker. "He looked happy to be there hanging with them." The late-night outing was followed by a visit to Butter the next night, where he chatted up a sexy blonde. Says a Hudson source: "She feels dumb thinking it was so serious."

Jun 09, 2008 : Kate Hudson Talks About Her Main Man

Kate Hudson and Lance Armstrong may have been spotted together over the past month in getaways as far apart as Texas and France, but the actress doesn't want to talk about that.

Opening up about a relationship "only causes more problems and more words taken out of context," Hudson, 29, told Ryan Seacrest on his KIIS-FM radio show Monday. "Everything is always misconstrued."

Not that discussing other males wasn't all right with Hudson, whose Seacrest appearance was to help promote pal (and celebrity hairstylist) David Babaii's WildAid hair products.

"My main priority in my life is my son," said Hudson, referring to her 4-year-old, Ryder.

Yet as far as anything remotely revolving around the cycling champ, Hudson said only, "It's better to let ... people speculate as much as they want to speculate."

Aug 13, 2008 : Caught in the Act!

• Kate Hudson, eating with her little man Ryder, 4, at R+D Kitchen on Santa Monica's Montana Avenue. The mother-son duo was especially playful during their meal, a source tells us. After munching on chicken salad and chatting with friends at a neighboring table, Hudson had a little fun with Ryder over dessert – dabbing his face with whipped cream! "She looked relaxed," a fellow diner says of the actress. When it was time to go, the two left with Ryder carrying the leftovers.