Parents need to know that Eternals is an epic-scale Marvel Cinematic Universe (MCU) adventure directed by Oscar-winning writer-director Chloé Zhao. It focuses on a team of ancient aliens who emerge after the events of Avengers: Endgame to battle the monstrous Deviants they thought they had defeated long ago. With a cast that includes Gemma Chan, Kumail Nanjiani, Salma Hayek, and more, this is one of the MCU's most diverse outings; it features the franchise's first deaf character and first openly gay hero. It's also arguably the MCU's most mature and character-driven film to date. It has themes of sacrifice, unconditional love, and teamwork, but also far more romance than usual -- including the MCU's first on-screen love scene (naked shoulders and all) -- and very scary creatures, one of whom eats a parent in front of his child in the movie's opening scene. While there are lots of talking scenes, action violence is also frequent and often devastating, both in a large-scale way (genocide, natural disasters, destruction) and an intimate one (betrayal, loss, grief). Weapons are used, and spoiler alert! main characters die/are killed. Language includes occasional but not frequent use of "s--t" "ass," "hell," etc., and characters drink socially.