The 31-year-old, "Keep Your Head Up" hitmaker is rumoured to compete with other participants for the Mirror Ball on the new season that kicks off on September 14, reported Entertainment Weekly.
In the last season Grammer came as a musical guest on the dance show.
Carrie Ann Inaba, Bruno Tonioli, and Julianne Hough will again take the chair of judges.
Other rumoured contestants are disgraced chef Paula Deen, music icon Chaka Khan, and "Spy Kids" actress Alexa Vega.
Bindi Irwin, Victor Espinoza, and Nick Carter are confirmed to appear in the show.