Ronda Rousey might be done fighting, but she's still a knockout ... and, we've collected all her hottest shots for her 38th birthday.
Whether in a sports bra and shorts fighting in the ring or in a black cocktail dress, Rousey's always taking people's breath away.
RR was at the top of the UFC pyramid when she won 12 straight fights between 2011 and 2015 -- before losing her Bantamweight title and retiring in 2016.
Since leaving mixed martial arts almost a decade ago, Ronda has embarked on a WWE career .