Photos: Mayweather vs. Pacquiao: Celebrities gather for fight night

“Birdman” and “Batman” actor Michael Keaton at the post-fight dinner.   (Ethan Miller / Getty Images for Showtime)

Actors Shad Moss, left, Michael B. Jordan, Showtime Sports and Event Programming General Manager Stephen Espinoza, TV host Michael Strahan and former NBA player Allen Iverson attend the Showtime VIP post-fight dinner in Vegas.   (Ethan Miller / Getty Images for Showtime)

Actors Liev Schreiber, left, Joshua Jackson and Diane Kruger attend the Showtime VIP post-fight dinner for Mayweather vs. Pacquiao at MGM Grand Hotel & Casino.

Actors Wendell Pierce, left, Michael B. Jordan, Pooch Hall and Glynn Turman attend the Showtime VIP post-fight dinner at MGM Grand Hotel & Casino.

Beyoncé Knowles and Jay Z attend the Floyd Mayweather Jr. vs. Manny Pacquiao welterweight unification championship bout at MGM Grand Garden Arena in Las Vegas.

Jamie Foxx prepares to sing the U.S. National Anthem before the Floyd Mayweather Jr. and Manny Pacquiao fight in at the MGM Grand Garden Arena in Las Vegas.   (Frederic J. Brown / AFP/Getty Images)

Actress Drew Barrymore has a ringside seat.   (Ethan Miller / Getty Images for SHOWTIME)

Elaine Chappelle, left, and Dave Chappelle pose ringside at Mayweather vs. Pacquiao.

Recording artist Justin Bieber, right, registers a bit of surprise in the arena before the start of the world welterweight championship bout between Floyd Mayweather Jr. and Manny Pacquiao.

Actor Denzel Washington watches the action before the main event between Floyd Mayweather Jr. and Manny Pacquiao.

“Avengers: Age of Ultron” actor Don Cheadle, left, and former boxer Sugar Ray Leonard pose ringside.

Singer Mary J. Blige attends the championship bout.

Oklahoma City Thunder guard Russell Westbrook at MGM Grand Garden Arena.   (Ethan Miller / Getty Images for Showtime)

“True Blood” actors Stephen Moyer, left, and Anna Paquin pose ringside.

Paris Hilton attends the championship bout between Floyd Mayweather Jr. and Manny Pacquiao.

The Rev. Jesse Jackson joins the crowd before the start of the championship bout between Floyd Mayweather Jr. and Manny Pacquiao.

NFL player Rob Gronkowski of the Super Bowl champion New England Patriots arrives for the Mayweather vs. Pacquiao bout.   (Ethan Miller / Getty Images for Showtime)

“Batman v. Superman” actor/director Ben Affleck poses ringside at Mayweather vs. Pacquiao.

President and Chief Executive Officer of CBS Leslie Moonves, left, TV personality Julie Chen and Chairman and Chief Executive Officer of the Kraft Group and New England Patriots owner Robert Kraft sit ringside.

Director Antoine Fuqua, left, and actors Jake Gyllenhaal and Mark Wahlberg attend the Showtime and HBO VIP pre-fight party.

Actress Maura Tierney attends the Showtime and HBO VIP pre-fight party for the “Mayweather vs. Pacquiao” telecast at the MGM Grand Hotel & Casino.   (Bryan Steffy / Getty Images for Showtime)

Actor Michael J. Fox attends the Showtime and HBO pre-fight party.

Jake Gyllenhaal attends Showtime and HBO’s pre-fight party for the Mayweather vs. Pacquiao fight.

Actors Claire Danes and Hugh Dancy attend the Showtime and HBO pre-fight party at the MGM Grand Hotel & Casino in Las Vegas.   (Bryan Steffy / Getty Images for Showtime)

Actress Allison Janney attends the Showtime and HBO pre-fight party at the MGM Grand Hotel & Casino in Las Vegas.   (Bryan Steffy / Getty Images for Showtime)

Actor Liev Schreiber attends the the Showtime and HBO pre-fight party at the MGM Grand Hotel & Casino in Las Vegas.   (Ethan Miller / Getty Images for Showtime)

Actor Matt Bomer attends the Showtime and HBO pre-fight party at the MGM Grand Hotel & Casino in Las Vegas.   (Bryan Steffy / Getty Images for Showtime)

Actor Ben Schwartz attends the Showtime and HBO pre-fight party at the MGM Grand Hotel & Casino in Las Vegas.   (Ethan Miller / Getty Images for Showtime)

Actor John Ortiz attends the Showtime and HBO pre-fight party at the MGM Grand Hotel & Casino in Las Vegas.   (Bryan Steffy / Getty Images for SHOWTIME)

Actress Lorraine Bracco attends the Showtime and HBO pre-fight party at the MGM Grand Hotel & Casino in Las Vegas.   (Bryan Steffy / Getty Images for Showtime)

Actress Shanola Hampton attends the Showtime and HBO pre-fight party at the MGM Grand Hotel & Casino in Las Vegas.   (Bryan Steffy / Getty Images for Showtime)

Former professional basketball player Reggie Miller attends the Showtime and HBO pre-fight party at the MGM Grand Hotel & Casino in Las Vegas.   (Bryan Steffy / Getty Images for Showtime)

Producer Jerry Bruckheimer attends the Showtime and HBO pre-fight party at the MGM Grand Hotel & Casino in Las Vegas.   (Bryan Steffy / Getty Images for Showtime)