TJ Isn't A 10-Year-Old Whiz Kid Anymore - See What The Cast Of Smart Guy Have Been Up To For The Past 20 Years

If you grew up watching Smart Guy, you know that it wasn't just any other sitcom. Sure, it was about a high school kid learning life lessons and getting into hijinks.

But Smart Guy had an added twist: that high school student was a 10-year-old, who was smarter than most of his teachers.

Believe it or not, Smart Guy first aired way back in 1997. So what have the cast been up to since then?

1. Floyd Henderson - John Marshall Jones

TJ's dad was a roofer who struggled to understand all the science that his son was constantly talking about, but he always had a helpful life lesson ready for the end of each episode.

Jones's career stretches back to the '80s, and he was a regular on Melrose Place before being cast as TJ's dad. After the series wrapped up, he went on to be a regular on shows like The Troop, Still Standing, and John Doe.

But Jones's career is still going strong. You might recognize him - a little grayer than before - on episodes of The Fosters and Bosch.

2.  Marcus Henderson - Jason Weaver

Did you know Weaver was the singing voice for Simba in The Lion King? He made a big impression on the show as TJ's older (but not wiser) brother. Marcus always had a new scheme to use his brother's big brain to his own advantage.

After Smart Guy ended, Weaver had parts in movies like ATL, The Ladykillers and Drumline, but his career has slowed down since then. Aside from a bit part on Black-ish, he's only had small roles for the last few years.

3. Mo - Omar Gooding

If TJ was the brains, and Marcus was the leader, Mo was definitely the heart of the trio. He also supplied some of the show's funniest lines.

Omar Gooding, Cuba Gooding Jr.'s younger brother, had already been on Blossom and Hangin' With Mr. Cooper before starring in Smart Guy. Afterwards, he had leading parts on shows like Playmakers and the Barbershop TV series.

His latest sitcom, Family Time, just ended, so expect to see more from Gooding in the future.

4. Mackey - J.D. Walsh

Playing the dimwitted Mackey was Walsh's first big break, but he followed it up with parts in Dharma and Greg and the disastrous Tremors TV series.

While he's mainly had small roles on movie and TV shows since the '90s, he was a regular as Gordon on Two and a Half Men, and played a scientist in The Amazing Spider-Man 2.

5. Goach Gerber - Dann Florek

Florek has had a long and interesting career, and his role as the gym teacher on Smart Guy is just one highlight. He also played the principal on Roseanne, and was a regular on LA Law.

In fact, Florek was playing homicide captain Donald Cragen on Law and Order at the same time as Coach Gerber. He reprised that part on the spin-off Special Victims Unit, where he played Cragen from 1999-2015.

6. Leslie / Monique - Taraji P. Henson

Yes, keep your eyes peeled for the future Empire star during the third season, when she plays one of Marcus's love interests in a pair of episodes. She actually appeared in a second season episode too, as a different character.

Smart Guy was just Henson's fifth role, after taking parts on shows like ER and Saved by the Bell: The New Class.

7. Tasha Henderson - Essence Atkins

TJ's older sister Tasha was the voice of reason in the Henderson house. Well, unless she needed to use TJ's smarts to her own advantage.

After Smart Guy, Atkins had small roles on Moesha and Sabrina the Teenage Witch, before starring in the sitcom Half and Half.

She went on to appear on shows like Are We There Yet? and Mr. Box Office, and had a memorable role in the movie How High.

Lately, she's been teaming up with Marlon Wayans for projects like his horror movie spoof Haunted House and his sitcom Marlon.

8. TJ - Tahj Mowry

The 10-year-old whiz kid at the heart of the show couldn't stay young forever, which is probably why Smart Guy only lasted for three seasons. But Mowry had a pretty impressive career after the show ended.

You may remember him as the voice of Wade on Kim Possible, and he also starred in the Disney Channel movie Seventeen Again. While his career has slowed down lately, he starred in the show Baby Daddy, which ended just last year.

Did you grow up watching this show?