Singer Lance Bass and actress Mary Elizabeth Ellis are calling on Mississippi Governor Phil Bryant to veto a so-called religious freedom bill approved by lawmakers that broadly protects opponents of marriage equality.

House Bill 1523 would protect individuals – a broad category which could include certain businesses – who act on their religious objections to marriage equality and transgender people. It would protect people who believe that “sexual relations are properly reserved” for married heterosexual couples and that a person's sex is “objectively determined by anatomy and genetics at time of birth.”

“This is all about discrimination,” Lance says in a two-and-a-half minute video released by the Human Rights Campaign (HRC), the nation's largest LGBT rights advocate.

“Let's be on the right side of history on this,” Ellis says.

“We're better than this bill and I urge my fellow Mississippians to join me in calling on Governor Bryant to veto HB 1523 when it reaches his desk this week,” Lance adds.

On Friday, Bryant, a Republican, refused to say whether he would sign the bill into law.

(Related: Mississippi Gov. Phil Bryant won't say whether he'll sign anti-gay bill.)