Robin Roberts, Martina Navratilova and Jason Collins were among the celebrities cheering Michael Sam as he became the first openly gay football player drafted by the NFL.

Sam, a 24-year-old All-American defensive end, was picked Saturday by the St. Louis Rams in the seventh and final round of this year's draft.

(Related: Michael Sam becomes first openly gay player drafted by NFL.)

Robbie Rogers, professional soccer's first openly gay player, congratulated Sam in a tweet which included mentions to Megan Rapinoe and Jason Collins: “Congrats @MikeSamFootball & @STLouisRams! Also good luck @mPinoe & @JasonCollins34 tonight! #myheros.”

“I'm getting ready for my game against the @MiamiHEAT,” out NBA player Jason Collins message, “but I wanted to say congrats to @MikeSamFootball & @STLouisRams. Great pick. Good luck.”

“Go Rams for drafting Michael Sam- a wise pic :),” out tennis legend Martina Navratilova tweeted.

Good Morning America co-host Robin Roberts noted the historic significance of the pick: “Congrats to all who were drafted, realizing a dream, a special moment. Including historic moment for @MikeSamFootball.”

Ben Cohen, whose group StandUp Foundation fights homophobia in sports, added: “Congrats to @michaelsamfootball for becoming first out LGBT player in NFL. We stand up with you!”