Elena Kampouris (Greek: Έλενα Καμπούρη; born September 16, 1997) is an American actress.

She is known for her roles as Allison Doss in the drama film Men, Women & Children (2014), Maya Decker in the NBC drama series American Odyssey (2015), Paris Miller in the sequels to the romantic comedy film franchise My Big Fat Greek Wedding (2016-2023), Juliet Sykes in the drama film Before I Fall (2017), and Chloe Sampson in the Netflix superhero series Jupiter's Legacy (2021).

[5][10] That same year, Kampouris made her film debut in the drama Labor Day, playing a young Rachel McCann.

[12] In 2015, she starred in the NBC thriller series American Odyssey as Maya Decker, the daughter of Peter Facinelli's character.

[16] On February 11, 2019, it was announced that Kampouris was cast as Chloe Sampson in the Netflix superhero series, Jupiter's Legacy.