Mark Wahlberg makes it look good

Mark Wahlberg puts on a brave face at Pain & Gain screening in New York just hours after his beloved Boston is bombed

Mark Wahlberg is a pro, and when he's booked into an event... he's going to attend. 

Especially when it's a screening to promote his latest movie, but when he walked into said event in New York on Monday night it was clearly with a heavy heart. 

Just hours earlier, his beloved home city, Boston, had been targeted in the most unspeakable fashion when devastating explosions brought carnage to the city's marathon. 

Scroll down for trailer...

'Prayers and thoughts with Boston': Mark Wahlberg looked grim-faced as he attended a screening for Pain and Gain in New York just hours after his beloved home city was targeted by bombers 

Mark, 41, was born in the Dorchester area of the city, the youngest of nine children he soon fell into a bad crowd and had several brushes with the city's police. 

But he turned his life around, and after his brother Donnie cut a swathe into the celebrity world as a member of '90s band, New Kids on the Block. 

Donnie, 43, now stars in CBS series Blue Bloods, and both he and his mega famous little brother retain strong ties to their home city, loyally and regularly attending Celtics games. 

Difficult time: Mark Tweeted this short but heartfelt message 

Family: Donnie Wahlberg, their mother Alma Elaine Wahlberg, chef Paul Wahlberg and Mark at the grand opening of Boston's Wahlburgers in 2011

Difficult day: Mark was a pro despite his stress over his city's terrible day 

Fulfilling his commitments: Mark posed with 50 Cent at the event, both men looked sombre after the days events

Practically perfect in every way: Olivia Palermo and boyfriend Johannes Huebl brought their epic good looks to the party 

So he was understandably ashen-faced and drawn as he went about his duties on Monday. 

Arriving at the screening with his eyes shielded by sunglasses, Mark removed them as he kindly chatted to waiting fans. 

The star, who has opened the restaurant Wahlbergers in the city with his brother, then posed with an equally lugubrious 50 Cent. 

Chiquitas: Real Housewives star Kelly Bensimon and Terminator beauty Jaimie Alexander brought glamour to the event 

Fabulous at 52: Carol Alt looked sensational in her tight black dress 

Bringing glamour to the event, and much wanted distraction for Wahlberg was Real Housewives star Kelly Bensimon, who revealed her cleavage in plunging dress. 

Twilight star Peter Facinelli was accompanied by his stunning girlfriend, Jaimie Alexander - who looked pretty as a picture in a pink, red and black mosaic dress. 

The ever chic Olivia Palermo was accompanied by her model boyfriend, Johannes Huebl. 

Differing approaches: Victor Cruz kept it casual while Palermo rocked out leather pants 

Leather loving pair: Dean Winters and guest donned his 'n' hers jackets for the event 

Others to attend of course include cast members photographer Terry Richardson and documentary film-maker Timothy Greenfield-Sanders.

Absent from the screening was Australian actress Rebel Wilson.

Pain & Gain is about a trio of body builders in Florida who get caught up in an extortion ring and kidnapping scheme that goes terribly wrong.

Along for the ride: Timothy Greenfield-Sanders and photographer Terry Richardson also joined in the fun 

Coupled up: Alexander was joined by her boyfriend Peter Facinelli at the event 

Pain and Gain: The Rock and Mark Wahlberg in the movie