|Home world:|| Unknown|
| Media information|
|Voiced by:||Josh Brolin|
|Portrayed by:|| Damion Poitier (The Avengers)|
Josh Brolin (Guardians if the Galaxy)
|First appearance:||The Avengers (2012)|
|Last appearance:||Avengers: Age of Ultron (2015)|
Thanos, also known as the Mad Titan, is the true main antagonist of the Marvel Cinematic Universe. He first appeared in the mid-credits scene of The Avengers and later had a cameo in Guardians of the Galaxy. Thanos also appeared in the mid-credits scene of Avengers: Age of Ultron. Thanos is set to be the main villain of Avengers: Infinity War and its sequel.
After Loki was banished from Asgard, he met with Thanos and his servant the Other. Loki struck a deal with Thanos to bring him the Tesseract. In exchange for acquiring Tesseract, Thanos offered Loki control of the Chitauri army and the Chitauri Scepter.
After Loki and the Chitauri were defeated by the Avengers, the Other told Thanos that humans were not as weak as they were promised, and that to challenge them would be to "court death". In response, Thanos simply turned and grinned.
Guardians of the Galaxy
Thanos struck a deal with Ronan the Accuser to bring him the Orb of Morage. In return for the Orb, Thanos would destroy the planet Xandar for Ronan, as revenge for the death of Ronan's father and grandfather.
When Gamora betrayed Ronan, Thanos called the Accuser to the Sanctuary for a meeting to discuss her betrayal. When Ronan asked only that Thanos take this matter seriously, the Mad Titan scolded Ronan; telling the Accuser that his politics bored him and that his demeanor was that of a pouty child. Thanos confirmed that he would honor their agreement, but also threatened to bath the starways in Ronan's blood should he return empty-handed again.
When Ronan captured the Orb, he betrayed Thanos by using the Infinity Stone contained within the Orb to increase his own power. Ronan vowed to destroy Xandar himself, and to come after Thanos once he was done.
Avengers: Age of Ultron
After Ultron was defeated by the Avengers, Thanos was seen dawning the Infinity Gauntlet and vowed to destroy Earth himself.
|Aliens in Movies|
|Frank the Pug · Spiky Bulba · Boglodite · Bug · Serleena|
The War of the Worlds Martian · Independence Day Alien · Interdimensional Being · Colonist · Roswell Alien · Brain · Mogwai · Gremlin · Tommyknocker · Scary Movie Alien · Night Skies Alien · Trilobite · Engineer · The Fallen · Scroop · Close Encounters of the Third Kind Alien · The Greys · Fire in the Sky Alien · Signs Alien · Chitauri · Chitauri Leviathan · The Other · Thanos