Actor Sacha Baron Cohen and his brother, composer Erran Baron Cohen, filled the room with laughs this afternoon, as they discussed their collaborations on "Da Ali G Show,"" "Borat" and "Brüno."

The discussion was today's (Oct. 29) keynote at The Hollywood Reporter/Billboard Film and TV Music Conference in Los Angeles, which concludes tomorrow at the Beverly Hilton. The panel was presented by ASCAP, and moderated by author and journalist Dan Kimpel.

The keynote began with stories about the Cohen brothers' humorous childhood antics, which included Friday night skits for their 90-year-old neighbor, where Erran would provide Yiddish tunes on the piano with Sacha singing along in a chicken voice. The discussion then moved to their film and TV collaborations in recent years.

Comedian Sacha Baron Cohen described his alter ego Ali G as "probably the first comedy character in England that saw himself as a musician - but obviously he had not talent as a musicians. So the challenge for Erran was to come up for the music of Ali G." At the time off the HBO program, drum and bass music was a popular form of music. So Erran Baron Cohen used elements of the genre and mixed it with "fart" noises and other odd noises.

"It was funny but also real," the comedian said. "You listened to it and said, 'Alright, this guy is one of these dreadful wanksta, wannabe DJs." He also noted that his brother is "great at making something real but comic at the same time, which is what we were trying to do with the shows and characters."

For the 2006 comedy film " Borat: Cultural Learnings of America for Make Benefit Glorious Nation of Kazakhstan," Sacha Baron Cohen traveled to a music club in Tel Aviv about two years prior to filming and found inspiration in band from the country Georgia. "I thought, 'Wow, this is the world of Borat,'" he said. "It was a 15 or 20-piece brass band that was slightly out of tune."

Meanwhile, the musical goal for Sacha Baron Cohen's most recent film, "Brüno," was to create an "electro gay house element," according to Erran Baron Cohen, who spent time researching at various dance clubs and through listening to electronic music.

The comedy also features a music video for the song "Dove of Peace," which features guest appearances by U2's Bono, Coldplay's Chris Martin, Sting, Slash, Elton John and Snoop Dogg. Sacha Baron Cohen said it was very difficult to round up all of the musicians for the shoot at Abbey Road in London.

"The key is Bono," the comedian said, noting he reached out to the U2 singer via phone. "Once you get bono you can get anyone."

But the most memorable moment from the video shoot was working with rapper Snoop Dogg, according to Sacha Baron Cohen. “I didn’t know if Snoop knew the character was gay, and I was a little scared, because he’s had a gangster rapper past and they’re generally not nice to gay-friendly characters,” he said. “But he ended with this great line where he just goes, ‘He’s gay – OK.’ And we decided to put that as the final line of the movie.”