Siena was born in Kauai, Hawaii,[3] to parents Karen and Kenneth Agudong.[1][4] She states she is of "Caucasian, Filipino, and Polynesian" descent.[5][6] She has an older sister, Sydney, who inspired her to act.[7]
Siena attended King Kaumuali‘i Elementary School and Island School. She then switched to online school for her acting career.[8]
Career
Agudong started acting when she was 7 in local productions, her first role being in Willy Wonka at the Hawaii Children’s Theatre.[7][8] She made her television debut at the age of 8 with a recurring role as Lulu Parker in Killer Women.[9] She played the recurring role of Natlee on Nicky, Ricky, Dicky & Dawn and has had guest roles in Teachers and Sydney to the Max.[10]
Agudong's work earned her several Young Artist Award and Young Entertainer Award nominations since 2015 and a win for Best Guest Starring Young Actress – 12 & Under in 2017.[11]
Agudong starred in 2018 Warner Bros.direct-to-video filmAlex & Me as Reagan Wills.[12] In 2018, Agudong also was cast as the lead, Sophia Miller, in the Nickelodeon series Star Falls.[13] In September 2018, it was announced she would play the titular role of a young con-artist in 2019 Netflix sitcom, No Good Nick, her first lead role.[14][15][16] In August 2019 it was announced that Agudong had been cast in the co-starring role of Reina Carvajal in the Disney Channel Original Movie, Upside-Down Magic, which premiered on July 31, 2020.[17][18] The latter film was officially Agudong's first lead role in a film. Siena later portrayed a younger Mia Toretto in F9.