Chris Pratt

as Peter Quill / Star-Lord

Born 06/21/1979, age

Zoe Saldaña

as Gamora

Born 06/19/1978, age

Dave Bautista

as Drax

Born 01/18/1969, age

Vin Diesel

as Baby Groot (voice)

Born 07/18/1967, age

Bradley Cooper

as Rocket (voice)

Born 01/05/1975, age

Kurt Russell

as Ego

Born 03/17/1951, age

Michael Rooker

as Yondu

Born 04/06/1955, age

Karen Gillan

as Nebula

Born 11/28/1987, age

Pom Klementieff

as Mantis

Born 05/03/1986, age

Sylvester Stallone

as Stakar Ogord

Born 07/06/1946, age

Elizabeth Debicki

as Ayesha

Born 08/24/1990, age

Chris Sullivan

as Taserface

Born 07/19/1980, age

Tommy Flanagan

as Tullk

Born 07/03/1965, age

Aaron Schwartz

as Young Ego Facial Reference

Born 01/04/1981, age

Ben Browder

as Sovereign Admiral

Born 12/11/1962, age

Evan Jones

as Retch

Born 04/01/1976, age

Steve Agee

as Gef

Born 02/26/1969, age

Seth Green

as Howard the Duck (voice)

Born 02/08/1974, age

Molly C. Quinn

as Howard's Date

Born 10/08/1993, age

Michael Rosenbaum

as Martinex

Born 07/11/1972, age

Stan Lee

as Watcher Informant

Born 12/28/1922

Died 11/12/2018, age

David Hasselhoff

as The Form of David Hasselhoff

Born 07/17/1952, age

Gregg Henry

as Grandpa Quill

Born 05/06/1952, age

Ving Rhames

as Charlie-27

Born 05/12/1959, age

Michelle Yeoh

as Aleta Ogord

Born 08/06/1962, age

Miley Cyrus

as Mainframe (voice) (uncredited)

Born 11/23/1992, age

Jeff Goldblum

as En Dwi Gast / Grandmaster (uncredited)

Born 10/22/1952, age