Zac Brown and Keith Urban have been added to the list of stars that will serve as presenters at the Grammy Awards on Sunday, February 13, in Los Angeles.

Brown is nominated for Best Country Song ("Free"), Best Country Performance By A Duo or Group With Vocals ("Free") and Best Country Collaboration With Vocals ("As She's Walking Away" with Alan Jackson).

Urban is nominated for Best Male Country Vocal Performance for his song "'Til Summer Comes Around."

Other newly announced presenters include Eva Longoria, Jennifer Lopez, Ricky Martin, Clay Matthews, Matthew Morrison, Ryan Seacrest, Jason Segal and Will.I.Am.

Also, Bob Dylan will perform with Mumford & Sons and the The Avett Brothers in a special salute to acoustic music.

Be sure to tune in to see which of your favorite stars will take home a Grammy!