Serena Williams, Stephen Curry and James Harden lead the nominees for the Nickelodeon show, taping July 11 and airing Aug. 10, with four apiece.
Michael Strahan is returning as host of Nickelodeon's Kids' Choice Awards.
The Super Bowl champion and Emmy winner (Good Morning America, Strahan and Sara, The $100,000 Pyramid, Fox NFL Sunday) previously hosted the inaugural edition of the awards show in 2014. This year's ceremony is set to tape July 11 from Barker Hangar in Santa Monica and premiere Aug. 10 at 8 p.m. ET/PT on Nickelodeon.
“Nickelodeon’s Kids’ Choice Sports is a one-of-a-kind awards show that brings all-star athletes, kids and of course, slime together,” Strahan said Thursday in a statement. “When I hosted the first year of the show, I loved it — the energy, stunts, kids, crowd and slime ... a lot of slime! Hosting this show has been one of my favorite things I’ve done, and this year is going to be the biggest, the baddest and the slimiest."
Nickelodeon on Thursday also unveiled the nominees for the 2019 ceremony, with Serena Williams, Stephen Curry and James Harden leading with four mentions apiece.
First-time nominees Patrick Mahomes, Saquon Barkley, Baker Mayfield and Naomi Osaka join LeBron James, Tom Brady, Alex Morgan and Carli Lloyd with three nominations each.
Other first-time nominees include Mookie Betts, Nikki Bella, Stephanie Gilmore, Tori Bowie, Blake Snell, Chris Sale, Aaron Donald, Khalil Mack, Alex Honnold, JuJu Smith-Schuster and Trae Young.
Nine new categories have been added this year, including favorite e-sports star, featuring the top pros in competitive gaming, and favorite athlete across all sports.
The awards are voted on by fans, with voting kicking off Thursday at NickPlay.com and via the Screens Up app.
A full list of nominees follows.
Bryce Harper (MLB, Philadelphia Phillies) LeBron James (NBA, Los Angeles Lakers) Lionel Messi (La Liga, FC Barcelona) Stephen Curry (NBA, Golden State Warriors) Tiger Woods (Golf) Tom Brady (NFL, New England Patriots)
Alex Morgan (NWSL, Orlando Pride) Chloe Kim (Snowboarder) Lindsey Vonn (Alpine Ski Racer) Naomi Osaka (WTA) Serena Williams (WTA) Simone Biles (Gymnast)
James Harden (NBA, Houston Rockets) Jimmy Butler (NBA, Philadelphia 76ers) Lewis Hamilton (Formula 1 Racing) Odell Beckham Jr. (NFL, Cleveland Browns) Russell Westbrook (NBA, Oklahoma City Thunder) Travis Kelce (NFL, Kansas City Chiefs)
Ibtihaj Muhammad (Fencing)
Nikki Bella (WWE)
Serena Williams (WTA)
Sloane Stephens (WTA)
Stephanie Gilmore (Surfing)
Tori Bowie (Track & Field)
Baker Mayfield (NFL, Cleveland Browns) Blake Snell (MLB, Tampa Bay Rays) Chris Sale (MLB, Boston Red Sox) Drew Brees (NFL, New Orleans Saints) Patrick Mahomes (NFL, Kansas City Chiefs) Tom Brady (NFL, New England Patriots)
Aaron Donald (NFL, Los Angeles Rams)
Giannis Antetokounmpo (NBA, Milwaukee Bucks)
Khalil Mack (NFL, Chicago Bears)
LeBron James (NBA, Los Angeles Lakers)
Rob Gronkowski (NFL, New England Patriots)
Serena Williams (WTA)
Carli Lloyd (NWSL, Sky Blue FC) Elena Delle Donne (WNBA, Washington Mystics) James Harden (NBA, Houston Rockets) Julian Edelman (NFL, New England Patriots) Kevin Durant (NBA, Golden State Warriors) Stephen Curry (NBA, Golden State Warriors)
Alex Honnold (Rock Climber) Brighton Zeuner (Skateboarder) Chloe Kim (Snowboarder) Jamie Anderson (Snowboarder) John John Florence (Surfer) Nyjah Huston (Skateboarder)
A’ja Wilson (WNBA, Las Vegas Aces)
Baker Mayfield (NFL, Cleveland Browns)
Luka Dončić (NBA, Dallas Mavericks)
Naomi Osaka (WTA)
Patrick Mahomes (NFL, Kansas City Chiefs)
Saquon Barkley (NFL, New York Giants)
Antonio Brown (NFL, Oakland Raiders) Braden Holtby (NHL, Washington Capitals) JuJu Smith-Schuster (NFL, Pittsburgh Steelers) Julian Edelman (NFL, New England Patriots) Julio Jones (NFL, Atlanta Falcons) Mookie Betts (MLB, Boston Red Sox)
Joey Logano (NASCAR) Katie Ledecky (Swimmer) Kyle Busch (NASCAR) Lewis Hamilton (Formula 1 Racing) Lindsey Vonn (Alpine Ski Racer) Mikaela Shiffrin (Alpine Ski Racer)
Alex Morgan (NWSL, Orlando Pride) Carli Lloyd (NWSL, Sky Blue FC) Russell Westbrook (NBA, Oklahoma City Thunder) Saquon Barkley (NFL, New York Giants) Trae Young (NBA, Atlanta Hawks) Zlatan Ibrahimović (MLS, LA Galaxy)
James Harden (NBA, Houston Rockets) John Tavares (NHL, Toronto Maple Leafs) Kawhi Leonard (NBA, Toronto Raptors) Klay Thompson (NBA, Golden State Warriors) Lionel Messi (La Liga, FC Barcelona) Stephen Curry (NBA, Golden State Warriors)
Alex Morgan (NWSL, Orlando Pride) Carli Lloyd (NWSL, Sky Blue FC) Carlos Vela (MLS, Los Angeles FC) Lionel Messi (La Liga, FC Barcelona) Zlatan Ibrahimović (MLS, LA Galaxy)
Brooks Koepka Dustin Johnson Lexi Thompson Rickie Fowler Rory McIlroy Tiger Woods
Naomi Osaka Novak Djokovic Rafael Nadal Roger Federer Serena Williams Sloane Stephens
Aaron Judge (New York Yankees)
Bryce Harper (Philadelphia Phillies)
Christian Yelich (Milwaukee Brewers)
Clayton Kershaw (Los Angeles Dodgers)
Mike Trout (Los Angeles Angels)
Mookie Betts (Boston Red Sox)
Breanna Stewart (Seattle Storm) Giannis Antetokounmpo (Milwaukee Bucks) James Harden (Houston Rockets) Joel Embiid (Philadelphia 76ers) Kevin Durant (Golden State Warriors) LeBron James (Los Angeles Lakers) Stephen Curry (Golden State Warriors)
Baker Mayfield (Cleveland Browns)
Khalil Mack (Chicago Bears)
Patrick Mahomes (Kansas City Chiefs)
Rob Gronkowski (New England Patriots)
Russell Wilson (Seattle Seahawks)
Saquon Barkley (New York Giants)
Tom Brady (New England Patriots)
Alexander Ovechkin (Washington Capitals)
Braden Holtby (Washington Capitals)
Jonathan Toews (Chicago Blackhawks)
Marc-André Fleury (Vegas Golden Knights)
P.K. Subban (Nashville Predators)
Patrick Kane (Chicago Blackhawks)
Sidney Crosby (Pittsburgh Penguins)
Aly Raisman Laurie Hernandez Ragan Smith Sam Mikulak Simone Biles Yul Moldauer