The Next Generation actors other roles and filmographies in TV shows and movies. Some Star Trek TNG celebs are Denise Crosby, Gates McFadden and Marina Sirtis.

Star Trek Actors Other Roles or Filmographies

Star Trek: The Next Generation (TNG)
Brent Spiner
(Lieutenant Commander Data) (176 episodes)
  Data is an android or artificial being that was created by Dr. Noonien Soong. In 2364 he was named as operations officer and second officer on the U.S.S. Enterprise and even temporarily commanded the U.S.S. Sutherland.
Denise Crosby
(Lieutenant Natasha "Tasha" Yar) (31 episodes)
  Tasha Yar was the original security chief under Captain Jean-Luc Picard on the U.S.S. Enterprise who led a tragic yet heroic life until her death in the line of duty in 2364.
Gates McFadden
(Doctor Beverly Crusher) (154 episodes)
  Beverly Crusher was the Chief Medical Officer on the U.S.S. Enterprise. She was replaced by Doctor Katherine Pulaski during the second season.
John de Lancie
(Q) (TNG - 8 episodes) (VOY - 3 episodes) (DS9 - 1 episode)
  Q is the Federation designation for an impudent, self-superior and sometimes malevolent being from the otherwise mysterious Q Continuum. The alien literally began to pop up in Federation space to torment Starfleet officers.
Jonathan Frakes
(Commander William T. Riker) (176 episodes)
  William Riker was promoted to commander, named first officer of U.S.S. Enterprise by Capt. Jean-Luc Picard, and had a temporary field promotion to captain during the Borg crisis.
Marina Sirtis
(Commander Deanna Troi) (176 episodes)
  Deanna Troi is mixed human and Betazoid heritage. She was ship's counselor for the U.S.S. Enterprise throughout its service life and its successor namesake. Troi's race is known for its inter-species telepathy and its emotional empathy.
Michelle Forbes
(Ensign Ro Laren) (9 episodes)
  Ro Laren is a Maquis rebel and wanted felon for disobeying orders on Garon II leading to eight fatalities. Released for a covert mission with Enterprise, later made permanent as con officer with ensign rank. Resigned to join Maquis.
Patrick Stewart
(Captain Jean-Luc Picard) (176 episodes)
  Captain Picard was assigned as commander and first officer on U.S.S. Stargazer, and later promoted to captain after the death of his superior in battle. In 2363 he was chosen to command new Galaxy-class U.S.S. Enterprise-D.
Whoopi Goldberg
(Guinan) (28 episodes)
  Guinan is a female member of the scattered yet long-lived El-Aurian "Listener" race, and became the civilian hostess of the U.S.S. Enterprise's Ten-Forward lounge at Picard's invitation in early 2365.
Wil Wheaton
(Wesley Crusher) (85 episodes)
  Wesley Crusher is the son of Dr. Beverly Crusher. After saving the Enterprise from a collapsed star and helping the "Traveler" return them to Federation space, he was granted rank of Acting Ensign. In 2370, he esigned from Starfleet to live on Dorvan V, and to journey to other planes of existence.