Singh joined the German giants in July, and it's been a whirlwind two months for the 20-year-old Kiwi.
The midfielder joined Bayern's pre-season tour which saw him get game time against the likes of Arsenal, Real Madrid and AC Milan.
Since then he's played three times for Bayern's second team in Germany's third division where he has scored and produced an assist.
His goal against Unterhaching was even nominated for Bayern's goal of the month.
Today Bayern announced that the former Wellington Phoenix midfielder was one of four players from the reserve side who would be added to the 24-man first-team squad for the 2019-20 UEFA Champions League competition.
It is unlikely that he will see much game time, but if injuries hit Bayern's midfield, or they decide to rotate players in the final group stage match having already qualified for the second round Singh is a chance to get some minutes.
Singh would not be the first New Zealand international to have played in the Champions League.
Wynton Rufer was the joint top scorer in the 1993-94 season, along with FC Barcelona's Ronald Koeman, scoring eight goals for Werder Bremen.
Bayern Munich's full squad
Goalkeepers: Manuel Neuer, Sven Ulreich, Christian Früchtl and Ron-Thorben Hoffman.
Defenders: Niklas Süle, Benjamin Pavard, Jérôme Boateng, Lucas Hernandez, David Alaba and Lars Lukas Mai.
Midfielders: Thiago Alcântara, Javi Martínez, Mickaël Cuisance, Leon Goretzka, Alphonso Davies, Joshua Kimmich, Corentin Tolisso, Sarpreet Singh, Oliver Batista Meier, Joshua Zirkzee and Daniels Ontužāns.
Forwards: Robert Lewandowski, Philippe Coutinho, Ivan Perišić, Fiete Arp, Serge Gnabry, Thomas Müller and Kingsley Coman.