The Monte Carlo round of the Mare Nostrum Tour on June 5-6 boasts a fine line-up of world swim stars, including at least eight Olympic champions so far.

The billboard includes Jones, Rice, Bernard, Kitajima, Mellouli, Soni, Coughlin and Peirsol, while China, Germany, Hungary and Russia have committed "national teams".

Here's the momentum building:

• Australia: Marieke Guehrer; Leisel Jiones; Stephanie Rice; Jessicah Schipper; Brenton Rickard
• Belgium: Yoris Grandjean
• France:Alain Bernard; Boris Steimetz; Christophe Lebon; Mylène Lazare; Coralie Balmy; Camille Muffat; Clément Lefert; Yannick Agnel
• Japan: Kosuke Kitajima (JPN)
• Slovenia: Sara Isakovic 
• Tunisia: Oussama Mellouli
• USA: Rebecca Soni; Jessica Hardy; Natalie Coughlin; Dana Vollmer; Aaron Peirsol; Eric Shanteau