Star Trek: Beginning and Ending Age of Every TNG Bridge Character
The bridge crew on Star Trek: The Next Generation worked together on the Enterprise for six years. This is their age during that time.

Star Trek: The Next Generation ran for seven seasons from 1987 to 1994, during which time its characters matured and wiser. The crew has been through so much on their mission to explore a strange new world that it might come as a surprise how old they actually are in the show's first and final seasons. TNG features many of the best characters in Trek history, including Captain Picard, Data, Wesley Crusher, and more.
Unlike Kirk's original crew in Star Trek: The Originals, who were around the same age, the eight main bridge characters in Captain Picard's Enterprise came together at different points in their lives. The cosmic date at the start of TNG is 2364 and 2370 by the end of the series. During this time, Picard's Enterprise crew attends weddings, child births, deaths, and birthdays together. This is the age they were during the Enterprise's first six years of running together.
Jean-Luc Picard

Captain Picard was born on July 13, 2305. He was 59 when TNG started and 65 by season 7. He was going to be a Ten years younger, but Patrick Stewart's characteristic baldness may have been one of the reasons for the decision to make the character older. Patrick Stewart was 47 when he started playing Picard and 54 when TNG ended.
William T. Riker

Commander Rick was born in 2335. He was 29 in the first season of TNG and 35 in the final season. He was originally scheduled to become captain at the age of 35, but did not accept the position until 2379 at the age of 44. Jonathan Frakes started TNG at 35 and ended at 42.
Data

Lieutenant Commander Data was created around 2336, which makes him 28 at the start of TNG and 34 at the end. He was in his early forties when he sacrificed himself in Star Trek: Nemesis. Brent Spiner was 38 when TNG started and 45 when it ended.
Geordi LaForge

Lieutenant LaForge was born on February 16, 2335. He was 28 when TNG started and 34 by the end. LeVar Burton was 30 when the series started and 37 in the final season.
Worf

Lieutenant Wolf was born in 2340. He was 24 when TNG started and he celebrated He celebrated his 30th birthday with the crew in the season 7 episode "Parallels." Michael Dorn was 35 when he started playing Worf and 42 when TNG ended, though he went on to play Worf in Star Trek: Deep Space Nine, setting the record for most appearances on a Star Trek film. By the end of DS9, Worf was 35 and Dorn was 47.
Deanna Troi

Advisor Troi was born on March 29, 2336. She was 28 when TNG started and 34 by the end. Marina Sirtis was 35 when TNG started and was 42 in the final season.
Beverly Crusher

Doctor Crusher was born on October 13, 2324. She was 40 in the first season of TNG and 41 when she left to become Starfleet medical director in the second season. She was 46 years old at the end of season 7. Gates McFadden was 38 at the start of TNG and 45 at the end.
Wesley Crusher

Wesley (Wil Wheaton) was born on July 29, 2348 AD, making him only 15 years old when he first boarded the Enterprise. He was 21 years old in the final season, though his last regular appearance on the show was before he left for Starfleet Academy in season 4, when he 18. Wil Wheaton was 15 in the first season of Star Trek: The Next Generation and 22 in the final season.