Mariela Castro, the daughter of Cuban President Raul Castro and niece of Fidel Castro, has congratulated Uruguay on passage of a gay marriage bill.

The Uruguay parliament on Wednesday gave final approval to a bill which overhauls the nation's marriage laws and includes gay and lesbian couples. President Jose Mujica, whose ruling Broad Front coalition backed the measure, has repeatedly said he'll sign the bill into law.

“I love it and congratulations. Once again another Latin American nation has succeeded, as we congratulate the DF [Federal District] in Mexico, Argentina, which approved a very advanced law,” Castro told reporters on Friday.

Castro, who heads the National Center for Sex Education (Cenesex), began introducing pro-gay reforms to the Communist Party in 2005. Her center has also mounted public campaigns to educate people about the issues surrounding homosexuality and transsexualism.

Last year, she announced a proposal to legalize civil unions for gay couples, which has yet to reach Parliament.

“We are talking to see what possibilities there are for that [measure] to be presented this year” in Parliament, said Castro, who was elected and sworn in as a deputy in February.