Put two comedy giants together in one room, and even a pack of jaded journalists will be buzzing with anticipation at their imminent arrival.
Dictaphones are arranged, prime seats are fought over and hushed whispers reach fever pitch as Ricky Gervais and Ben Stiller make their entrance.
Gervais, 47, and Stiller, 43, have amassed an impressive body of work between them. As the co-creator of The Office, Gervais won unlikely empathy for the sadly-comedic character David Brent, and the subsequent plaudits the series received brought him huge success on both sides of the Atlantic.
His subsequent star pulling power allowed him to secure unlikely cameos from the likes of Robert de Niro and Kate Winslet, who willingly sent themselves up in his follow-up project, Extras.
Stiller, meanwhile, has been described as a "ringmaster who knows everybody in Hollywood" by his close friend and co-star Hank Azaria, having been behind box office smash hits such as Meet The Parents and its sequel Meet the Fockers, Dodgeball and Tropic Thunder.
The reason for their joint appearance is to talk about the film they both star in, Night At The Museum 2, the sequel to Night At The Museum. It marks the third time the two have worked together - Stiller appeared in the very first episode of Extras as an ego-driven director.
Back in the press room, there's a call for silence that breaks into applause as the duo arrive.
Gervais, wearing black trousers, T-shirt and jacket, leads the way. He is closely followed by Stiller, who at around 5ft 6in, also wearing black and sporting impressively bouffant hair, makes Gervais look positively statuesque.
The premise of the Night At The Museum movies revolves around the idea of museum exhibits coming to life once visitors have left and the lights turned off.
Stiller reprises the role of Larry Daley, the former museum night guard at The Museum of Natural History who has now found success as an infomercial inventor.
The museum's assorted historical characters, played by the likes of Owen Wilson, Robin Williams and Steve Coogan all reappear, along with a host of new faces such as Amy Adams as Amelia Earhart and Azaria as an Egyptian pharaoh. Gervais, meanwhile, is back as Daley's pesky boss, the oblivious Dr McPhee.
"This time Larry isn't amazed by the exhibits coming to life because he knows what to expect," says Stiller, whose voice goes up at the end of each sentence? Like he's always asking a question?
"We had to figure out a way to start the second movie, particularly as Larry was so happy at the end of the first movie. The idea that Larry had become successful and had all the problems that come with success had drawn him away from his true happiness. Success doesn't necessarily mean happiness."
At this point, Gervais decides to pipe up in his thick Reading accent and quips, "Yeah, I did the sequel for the money". Cue much laughter from the assembled media.
On a roll, Gervais continues to spar with his arguably more famous co-star by pointing out how many dictaphones happen to be in front of each them.
"Look he's only got one," says Gervais in that recognisable high-pitched voice. "Look at all of mine!" Cue even more laughter from the journalists, even more from Gervais and a lukewarm smile from Stiller, who at this point looks like he's misplaced his sense of humour.
Both cast and crew wanted everything in the sequel to not only be bigger but better, so the action was moved to the world's largest museum, the Smithsonian Institution in Washington.
While it meant an infinite amount of creative possibilities for the production team, it does beg the question whether there's now anywhere else the film franchise can go.
"I don't know," says Stiller. "The idea of doing a third one would be great. I think it would be really fun, it's just figuring out how it could get any bigger, any different - if indeed it seems like enough people wanted to see a third one."
"How about just a normal museum where nothing comes to life, just following the admin," says Gervais pretending to type. "Just naturalise it all."
Even Stiller manages to raise a laugh at the thought of this as the premise for their third blockbuster.
"I remember it was really exciting the first day Ricky turned up because it had been weeks and weeks of acting with nothing," he says.
"Of running away from a dinosaur, although there was no dinosaur to run away from, or running away from Attila the Hun and there's nothing there, no people to really interact with. Then Ricky showed up one day and it was like oh my god, so..."
"Oh I see, so I'm better than nothing," says Gervais, pretending to be hurt.
Chuckling as he recalls their banter, Stiller adds, "But it was almost too much when Ricky turned up after acting with no-one for weeks and weeks."
"The best part of being Dr McPhee was trying to be so strange as to really put Ben off. That was the most fun in the world," says Gervais.
"The characters just got madder and madder to the point where Ben stopped the take we were doing and said, 'That's just ridiculous'. And do you know that's the nicest thing anyone has ever said to me."
"He just went off on this crazy tangent," adds Stiller. "About what my character was probably thinking and saying and it was like, so far from reality, there was no motivation for it whatsoever. I just had to say something!
"But we did laugh a lot. Of course, it's in Ricky's contract, he'll turn up for 12 hours to do all his work and that's it... for all two movies!"
Gervais finds this hilarious and throws his head back, releasing a very loud laugh.
But if Stiller found Gervais's habits annoying, it was nothing compared to Dexter, the Capuchin monkey who also returns to torment Larry. One particular scene sees Dexter heartily slapping Larry around the chops, and Stiller's exasperated expression as he describes the filming scene says it all.
"I'm beyond tired of the monkey, I resent it. I want to kill the monkey," he says, resulting in much laughter from Gervais, who adds, "There's the headline!"
"No, monkey-slapping day wasn't the most exciting day of the shoot for me, continues Stiller. "I'd rather do scenes with you."
"Again!" says Ricky in another high-pitched outburst. "So, that's nothing, monkey, then Ricky! I get it."
Everyone's having such a good time, and with Gervais on particular fine form there's almost an audible sigh of disappointment when that riposte is followed by the announcement that our time with the two funny men is up.