Live-Action:
* Finding Nemo (2003) - Nemo (voice)
* Finding Dory (2016) - Nemo (voice)
* The Princess Diaries 2: Royal Engagement (2004) - Michael Moscovitz
* The Santa Clause 3: The Escape Clause (2006) - Charlie Calvin
* The Spiderwick Chronicles (2008) - Jared Grace
* The Last Airbender (2010) - Sokka
* My Soul to Take (2010) - Adam
* Percy Jackson & the Olympians: The Lightning Thief (2010) - Luke Castellan
* The Amazing Spider-Man 2 (2014) - Flash Thompson (uncredited)
* The Visit (2015) - Tyler
* The Bye Bye Man (2017) - Elliott
* The Wrong Missy (2020) - Tim
* The Unbreakable Boy (2020) - Anthony
* The Batman (2022) - Young Bruce Wayne (voice)
Animated:
* The Little Mermaid: Ariel's Beginning (2008) - Prince Eric (voice)
* The Princess and the Frog (2009) - Louis (voice)
* The Princess and the Frog (2009) - Prince Naveen (voice - singing)
* Tangled Ever After (2012) - Young Flynn Rider (voice)
This is not an exhaustive list. You can find more information about Alexander Gould's film work on websites like IMDb.