Balthazar Getty and Sienna Miller initially denied rumors of a romance but now the 33-year-old Brothers & Sisters actor is coming clean.

Balthazar released the statement below confirming that he has split from his wife, Rosetta, who is said to feel “humiliated” by the very public romance.

Mr. Getty says, “The breakdown of a marriage is a very difficult and painful experience, especially when children are involved. In light of the fact that many pictures have surfaced in print and on the internet, which has caused myself and my family great embarrassment, I felt it necessary to at least acknowledge publicly that yes indeed by wife and I have separated and I will not be commenting any further.”

Balthazar and Sienna, who was topless, were seen vacationing together in Italy last week.

Fresh from her steamy vacation with married man Balthazar Getty, a solo Sienna Miller looks a bit down as she hides her face while out and about in London on Monday.

Sienna’s much-publicized affair with the 33-year-old Brothers & Sisters star (and heir to a $50 billion oil fortune) prompted his fashion designer wife Rosetta, 37, to flee the country. She said she felt “humiliated” by his behavior.

10+ pictures inside of Sienna Miller looking lonely in London… More Here! »

Sienna Miller’s steamy (and now public) affair with Balthazar Getty has been going on for at least at least two months, reports People.

But the 33-year-old Brothers & Sisters actor and his wife Rosetta “have been living separate lives for a while,” a source reveals to the mag.

Balthazar, who still has a tattoo of his wife’s name on his chest, married Rosetta in May 2000 and have four children together: Cassius, 8, Grace, 7, Violet, 4, and June, 10 months.

“It’s humiliating,” a friend admits. “Rosetta left the country to protect the kids, and he continues to see Sienna publicly.”

Click here to see pictures of a topless Sienna and shirtless Balthazar

Brothers & Sisters star Balthazar Getty cuddles with a topless Sienna Miller while vacationing together in Positano, Italy on Friday.

The lovebirds spent hours snuggling up to one another in their hotel bedroom, enjoying the balcony view every once in awhile.

“Sienna was literally beaming. She seemed completely at ease, very relaxed and very happy,” an onlooker said. “Balthazar had his arm around her most of the time, and they didn’t leave each other alone throughout the trip.”

Balthazar has been married to Rosetta Millington for eight years and they have four children together: Cassius, 8, Grace, 7, Violet, 4, and June, 9 months. Sienna was last romantically involved with Welsh actor Rhys Ifans.

WHAT DO YOU THINK of 25-year-old Sienna Miller fooling around with 33-year-old married man Balthazar Getty?

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Sienna Miller has been caught kissing married man Balthazar Getty while vacationing together on the glamorous Amalfi Coast in Italy.

While on a boat together, the 25-year-old G.I. Joe actress was seen topless and the 33-year-old Brothers & Sisters actor was seen shirtless. The pair were seen swapping spit and kept their arms wrapped around each other all day.

A source close to Ms. Miller reveals, “Siena is totally besotted with Balthazar. Their relationship has gone from strength to strength over the past month and Sienna finds him utterly irresistible. Balthazar arranged for the trip to one of the most beautiful and exclusive parts of the Med.”

Sienna was last romantically linked to Welsh actor Rhys Ifans. Balthazar has been married to Rosetta Millington for eight years and they have four children together: Cassius, 8, Grace, 7, Violet, 4, and June, 9 months. The poor wife and kids!

Check out the NSFW pictures at UK’s The Daily Mail and The Sun.

DO YOU THINK Sienna Miller is a homewrecker?

Sienna Miller keeps it simple in a gray tank as she arrives at LAX airport in Los Angeles after jetting in from London on Sunday.

The 26-year-old actress has been promoting her new film The Edge of Love in England the past few days.

Ms. Miller recently shared about her Edge of Love co-star Keira Knightley, saying, “Keira is the most beautiful woman in the world. We totally bonded on the movie and it was so amazing to find a girlfriend in the business!”

25+ pictures of Sienna Miller going gray… More Here! »

Keira Knightly is pretty in purple Erdem at the Private VIP Party for her and Sienna Miller’s new movie, Edge of Love at the Berkley Hotel on Thursday in London, England. (Si’s dressed in Jasmine Di Milo.)

Yesterday at the Edinburgh International Film Festival, Keira expressed how happy she was to go nude on film.

“I always bare my breasts,” she said. “It’s not like it’s only in this film!”

Referring to a scene The Edge of Love with her onscreen husband Cillian Murphy, Keira said: “It was very simple. It was a sex scene and I never like them when they’ve got bras on.”

15+ pictures inside of VIP princess Keira Knightley… More Here! »

Sienna Miller (in Jasmine Di Milo) gets a little crazy on the red carpet with her black bowler hat and fringe dress at the world premiere of her new movie, The Edge of Love on Wednesday at the Edinburgh Film Festival in Scotland. Costars Keira Knightley (in Chanel) and Matthew Rhys were also present.

To check out Keira and Sienna face off as contestants in a barrage of questions about the other’s career, visit EmpireOnline.com. The prize? A strawberry-flavored lollipop! (Spoiler: Keira wins! Hehehehe.)

10+ pictures inside of Sienna Miller on the fringe… More Here! »