Brian To'o (born 18 August 1998) is a Samoa international rugby league footballer who plays as a winger for the Penrith Panthers in the NRL.
He won both the 2021 and the 2022 NRL Grand Finals with the Panthers. He has represented the NSW Blues in State of Origin and Samoa at Test and 9's level.
To'o made his NRL debut in round 10 of the 2019 NRL season for Penrith against the New Zealand Warriors.
To'o scored his first try in the top grade in Round 14 of the 2019 NRL season against South Sydney at ANZ Stadium in a 19–18 victory. In Round 18 against St George, To'o scored two tries as Penrith won the match 40–18 at Panthers Stadium.
To'o made a total of 15 appearances for Penrith in the 2019 NRL season as the club finished tenth on the table and missed out on the finals for the first time since 2015