SAN ANTONIO -

U.S. Rep. Joaquin Castro is reportedly engaged to be married.

Congressman Castro's twin brother, Mayor Julian Castro, announced the news about his brother on his Facebook page.

Congressman Castro is engaged to longtime friend Anna Flores. 

Mayor Castro said about the couple, "they've been together for three years and been great friends for five."

He also wished them a blessed future together. Congressman Castro has not publicly commented on the engagement.