Olivia Rodrigo celebrated her 19th birthday on Sunday night at a party with BFF Iris Apatow, plus Iris' new boyfriend Ryder Robinson (who…

Olivia Rodrigo Had BFF Iris Apatow By Her Side at 19th Birthday Party!: Photo 1339262, Iris Apatow, Olivia Rodrigo, Ryder Robinson, The Kid Laroi Pictures

Olivia Rodrigo Had BFF Iris Apatow By Her Side at 19th Birthday Party!: Photo 1339265, Iris Apatow, Olivia Rodrigo, Ryder Robinson, The Kid Laroi Pictures

Olivia Rodrigo Dresses as a Sexy Cowgirl at 19th Birthday Party with BFF Iris Apatow, Iris Apatow, Olivia Rodrigo, Ryder Robinson, The Kid LAROI

Olivia Rodrigo Dresses as a Sexy Cowgirl at 19th Birthday Party with BFF Iris Apatow: Photo 4709641, Iris Apatow, Olivia Rodrigo, Ryder Robinson, The Kid LAROI Photos

Olivia Rodrigo Dresses as a Sexy Cowgirl at 19th Birthday Party with BFF Iris Apatow, Iris Apatow, Olivia Rodrigo, Ryder Robinson, The Kid LAROI

Olivia Rodrigo Dresses as a Sexy Cowgirl at 19th Birthday Party with BFF Iris Apatow: Photo 4709587, Iris Apatow, Olivia Rodrigo, Ryder Robinson, The Kid LAROI Photos

Olivia Rodrigo Dresses as a Sexy Cowgirl at 19th Birthday Party with BFF Iris Apatow: Photo 4709650, Iris Apatow, Olivia Rodrigo, Ryder Robinson, The Kid LAROI Photos

Olivia Rodrigo Dresses as a Sexy Cowgirl at 19th Birthday Party with BFF Iris Apatow: Photo 4709587, Iris Apatow, Olivia Rodrigo, Ryder Robinson, The Kid LAROI Photos

Olivia Rodrigo Had BFF Iris Apatow By Her Side at 19th Birthday Party!, Iris Apatow, Olivia Rodrigo, Ryder Robinson, The Kid Laroi