Watch Birthday Girl (2023) HD Full Movie Free on solarmovie.do. Watch Birthday Girl (2023) online free. Nanna has invited her daughter Cille and her best friend to celebrate Cille's 18th birthday on a cru...Nanna has invited her daughter Cille and her best friend to celebrate Cille's 18th birthday on a cruise ship bound for the Caribbean. But the first evening of the dream vacation itself turns into a nightmare.