Two transgender girls in New Hampshire on Wednesday set in motion the first legal challenge to President Donald Trump's executive order that would ban them from participating in school sports for female athletes.

A federal judge on Wednesday granted a request from two transgender high school athletes in New Hampshire to add the Trump administration to a lawsuit challenging a state law barring trans athletes from girls’ and women’s sports after President Trump’s issued an executive order doing the same earlier this month.

Parker Tirrell is one of the teenagers fighting a New Hampshire law that bans transgender athletes in grades five through twelve from playing on girls sports teams.