• Claire Danes and boyfriend Hugh Dancy, strolling and shopping in downtown Manhattan. The actress stopped into the SoHo day spa Haven, then met Dancy in the Apple store. Think they were picking up a coveted iPhone?

• Recent Tony nominee Ethan Hawke, walking along the Santa Monica beach with a blonde female friend. The two enjoyed a leisurely chat while taking in the sunny day. But Hawke made sure to practice down-home sun safety: He wore a big, black cowboy hat and an oversized red plaid shirt with khaki shorts.

• Her (former) beaus have cheered her from the stands - now it’s Mandy Moore’s turn. The singer arrived at Hollywood’s Hotel Café to support her current boyfriend, singer-songwriter Greg Laswell, during his recent concert. After his set, Moore casually chatted with Laswell, his friends and family. And an onlooker tells us: “She looked adorable.” Aww!

• Christie Brinkley, attending the screening of In the Shadow of the Moon, a documentary about the Apollo lunar missions, in Southampton. Brinkley, sporting a blue gingham Ralph Lauren dress, told us she was looking forward to celebrating July 4, although, “the fireworks are going to happen out here on the 7th.” Following the screening, Brinkley headed to a post-film dinner at Southampton restaurant Savanna’s. Also attending the screening: Barbara Walters, who was drinking from a long straw and nibbling popcorn in the audience.

• We love the ’80s! And so does Grey’s Anatomy’s T.R. Knight, who was rocking out with Martin Gore (of New Wave luminaries Depeche Mode) during Cyndi Lauper’s True Colors tour at L.A.’s Greek Theatre. A fellow concertgoer says the actor, who was really getting into Erasure’s set, seemed to know all the lyrics as he sang to the music. Meanwhile, another of the decade’s icons, Aidan Quinn, recently perused a script over breakfast at the Backyard Restaurant in the W Los Angeles. “His blue eyes still had their same hypnotic effect as he peered up while reading his script,” says an onlooker, adding, Quinn is “still extremely sexy.”

• By BRYAN ALEXANDER, LISA INGRASSIA, BRENDA RODRIGUEZ and JEFFREY SLONIM

Tuesday’s Caught in the Act >

• Claire Danes and British beau Hugh

Dancy, strolling together in New York City after a joint trip to the gym.

The actress is currently starring in a Broadway production of Pygmalion.

• Katherine Heigl, dining a deux with close pal (and costar) T.R.

Knight at Japanese restaurant R23 in downtown Los Angeles. Looking like “best

friends,” the two ordered a lot of sushi, served on the restaurant’s

hand-painted boards. And, an onlooker tells us, “they laughed and talked for

quite a while” before heading out.

• A nearly unrecognizable Sacha Baron Cohen - sporting a full

beard, hat and glasses - hit up the concession stand at the Arclight

Hollywood. The funnyman ordered a hot dog - light on the ketchup -before heading into his movie with his British male pal. Also at the movies:

Anna Faris, sipping Irish coffee with a male friend in the cinema’s

lounge area.

• Matthew Broderick, feting the 100th birthday of New York

landmark the Plaza, during a rooftop party complete with fireworks.

Also at the bash: Martha Stewart, who fondly recalled having drinks at the hotel’s Trader Vic’s during her college days.

• Justin Timberlake, still going strong with

Jessica Biel during a dinner at Morton’s The Steakhouse

in Toronto. According to a source, the two were very affectionate over

filets and vegetable sides.

• Courteney Cox Arquette and hubby

David, sharing a family day with daughter Coco, 3 (in

star-shaped sunglasses), at Kinerase’s CelEBration on the Pier in

Santa Monica. Sure, it was a charitable event (benefiting research for

epidermolysis bullosa, a rare skin disease), but Arquette was especially generous with his participation. The actor - in only a shirt and boxers -took a seat in a dunk tank and teased, “What’s the matter with you people? It’s

getting hot up here!” Sister

Patricia Arquette and his niece, Harlow, 4, took the bait, dunking the actor - twice! Meanwhile, other

family-oriented celebs, like Adam Sandler, Kate Beckinsale and Noah Wyle milled around at the carnival with their

tots.

• By JENNIFER GARCIA, SCOTT HUVER, JEFFREY SLONIM and MICHELLE TAN

Tuesday’s Caught in the Act >

Hugh Dancy and Claire Danes seem to be getting along swimmingly: After attending a spate of events in the last few days, the press-shy couple are planning a scuba-diving vacation.

“I’ve never scuba-dived, but hopefully, I’m going to, the day after tomorrow,” Dancy told PEOPLE Monday at a Cinema Society screening of their film Evening in New York City. “I’m going on a holiday.”

Asked if Danes was going with him on the vacation, Dancy said: “Yes.”

But the actor, who just wrapped up a stint in the Tony award-winning play Journey’s End, was coy about their exact destination. When asked if the getaway was to an island, Dancy would only say, “It’s not a landlocked country.”

He added: “I’ve never done scuba, but I’m not very good at those holidays where you do absolutely nothing, so I figured I’d learn to swim underwater.” (Speaking of tropical getaways, Danes will be honored at the 2007 Maui Film Festival, to be held June 13-17.)

And Danes supports her beau’s adventurous side. Backstage at Sunday’s Tony Awards in the gift lounge, she requested an Invicta diving watch for Dancy, according to a source.

Dancy and Danes began dating while filming Evening in Newport, R.I. “We hadn’t met before,” Dancy said Monday. “It’s an amazing place.”

Danes recently told PEOPLE that she and Dancy “just happened upon each other because we were friends” - and Dancy told PEOPLE of the relationship: “I’m having a great time.”

• Claire Danes, lunching outdoors with actor boyfriend Hugh Dancy at Italian restaurant Bar Pitti in New York City’s West Village. “Our relationship is still new,” Danes told us at a recent cocktail party to kick off nonprofit Safe Horizon’s Champion Awards Luncheon next month. “I think we just happened upon each other because we were friends.” What does the couple, who met on the set of the drama Evening, do for fun? “We like to stay in,” she said, as well as make weekly visits to Big Apple soul-food eatery The Pink Tea Cup. “(It’s) his favorite restaurant.”

• Sean %26#34;Diddy%26#34; Combs and Jay-Z, holding court at a table near the deejay booth at New York City club Butter. The hip-hop stars were a low-key presence for much of the evening, but when the deejay began spinning Diddy’s song “Come to Me,” the rapper bobbed his head to the beat. The pals finally left the club together at around 2:30 a.m.

• Fergie, posing for pictures with and wishing “Happy Birthday” to a fellow diner celebrating his 18th at West Hollywood restaurant Blowfish Sushi to Die For. “She was really sweet. It literally made his whole night,” an onlooker tells us about the singer, who was having a late-night meal with friends in the private dining room.

• Dancing With the Stars celebs Joey Fatone, Heather Mills, Ian Ziering and Cheryl Burke as well as her boyfriend Matthew Lawrence, partying at Hollywood hot spot Parc. The group sipped on flutes of rose champagne and - what else? - danced the night away. And an affectionate Burke and Lawrence kissed and held hands.

• Mandy Moore, comforting a male companion who accidentally spilled a glass of red wine on her sweater and green alligator bag while dining at New York City eatery Nobu. The singer-actress laughed it up over black cod with miso and rock shrimp at the trendy Japanese restaurant. Also making the Nobu scene: Nick Cannon, who cuddled at a corner table with his girlfriend, Victoria’s Secret model Selita Ebanks.

• By BRYAN ALEXANDER, TIFFANY HOPKINS and HAIWEN LU

Tuesday’s Caught in the Act >