After college he moved to
Los Angeles in 2006 and quickly garnered attention in several film and television projects. He played a crooked cop with entertaining gusto in The Sabi Company's
Down and Dangerous (2013). Marquand portrayed screen legend
Paul Newman on AMC's
Mad Men. Marquand is best known for the recurring role of
Aaron on
The Walking Dead, the popular TV series' first
gay male character. Since 2018, he has portrayed and voiced two characters in the
Marvel Cinematic Universe:
Red Skull in the films
Avengers: Infinity War (2018) and
Avengers: Endgame (2019), as well as
Ultron in the
virtual reality experience
Avengers: Damage Control (2019) and as an alternate version of the character in the film
Doctor Strange in the Multiverse of Madness (2022), replacing
Hugo Weaving and
James Spader. Marquand voiced both characters in the television series
What If...? (2021). He voiced Professor X in the X-Men ‘97 cartoon. An accomplished
voiceover actor, Ross has lent his talents to productions such as
Phineas and Ferb, This expertise led to a starring and producing role on Pop TV's
Impress Me, helmed by Ben Shelton and
Rainn Wilson. He also voiced the titular character of
Wreck-It Ralph in
Disney Speedstorm, replacing both John C. Reilly and Brian T. Delaney. ==Filmography==