Kate Hudson’s four-year-old son Ryder went to a Father’s Day brunch with her new beau Lance Armstrong — and dad Chris Robinson.

With their kids in tow, Hudson and Armstrong split into two cabs for the ride from the actress’ New York City home to Brooklyn restaurant Frankie’s 457.

“There was a boys’ cab and a girls’ cab,” an onlooker tells Joynews. “Ryder went with Lance.

“He was very comfortable with Lance,” the onlooker adds. “He ran right towards him!”

The actress and the cyclist — who were also spotted in Toronto over the weekend at a charity bike race — put the focus of Father’s Day on their young kids. (Armstrong has a son, Luke, 8, and twin daughters Isabelle and Grace, 6, with ex-wife Kristin, whom he split from in 2003.)

“They were corralling all these kids together,” the eyewitness says. “It was really about the kids.”

Ten minutes after arriving in Brooklyn, two more guests showed up: Hudson’s ex Chris Robinson and his girlfriend.

“They all celebrated Father’s Day together,” the witness tells Us.

The big group left after about two hours, at 12:30 p.m.

Hudson has played coy about her two-month relationship with Armstrong. “You should ask him [if we're dating],” she told Barbara Walters (Watch here).

Tell Us: Do you think it’s too early for Kate and Lance to introduce their kids?

Kate Hudson and Lance Armstrong were seen kissing in Cannes.

It sure didn’t take Kate Hudson long to get over ex-boyfriend Owen Wilson. The same day that Kate and Owen’s split went public Kate was seen attending a Kid Rock concert followed by dinner at New York City’s Wildwood BBQ with Lance Armstrong. The next Saturday the duo was spotted having dinner at Chuy’s Hula Hut in Austin, Texas.

Kate and Lance have now taken their relationship to the next level as they danced and kissed the night away at Dolce & Gabbana’s annual party Friday night, May 23, in Cannes. A source told People magazine that, “They were beaming at each other,” and that they were, “So cute.”

Hollywood actresses sure move on fast. Good thing there are enough hunks in Hollywood to go around.

OK! Magazine reports  Kate Hudson and Lance Armstrong didn’t bother hiding their affection for one another while at Dolce & Gabbana’s party at Baoli restaurant in Cannes Friday.

After hitting the dance floor, a source reportedly found Kate cleaning a white men’s shirt in the bathroom singe. “I asked her what she was doing,” recalls the source. “Kate blushed and laughed — And then Lance walked out of a stall topless!”

Ah, yes.  Because nothing says romance like having a quickie in a public bathroom stall before wiping up the jizz from your man’s shirt. Let’s hope she wore some underwear… or he, at least, a condom.  Cum drizzling down your leg is not a good look!

Here are some old photos of Kate in a bikini for your viewing pleasure. Enjoy.