17 Side-By-Sides Of The "Young Sheldon" Cast At The Start Of The Show Vs. The End

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Young Sheldon is ending after seven seasons. Looking back, it's kinda wild how much the actors who played Sheldon Cooper, his family, and his friends have grown and changed over the course of the series.

Jim Parsons and young Iain Armitage onstage holding hands
Cbs Photo Archive / CBS via Getty Images

Here are 17 side-by-sides of the Young Sheldon cast at the start of the show vs. the end:

1.Here's Iain Armitage as Sheldon Cooper in Season 1:

Young Sheldon in a plaid shirt standing in front of lockers

He was 9 when the series premiered.

CBS / Via Netflix

And here's Iain in Season 7:

teenage Sheldon wearing a Green Lantern shirt

He's 15 now.

CBS / Via Paramount+

Here's a side-by-side:

Sheldon in Season 1 vs Season 7
CBS / Via Netflix / Paramount+

2.Here's Raegan Revord as Missy Cooper, Sheldon's twin sister, in Season 1:

Young Missy at a dinner table in a scene looking surprised, wearing a denim dress with a blouse

She was also 9 when the series began.

CBS / Via Netflix

And here's Raegan in Season 7:

teenage Missy in a plaid shirt sitting at dinner table

She's 16 now.

CBS / Via Paramount+

Here's a side-by-side:

Side-by-side stills from a TV series showing Missy as a young girl and as a teenager
CBS / Via Netflix / Paramount+

3.Here's Montana Jordan as Georgie Cooper, Sheldon's older brother, in Season 1:

Georgie with a mullet in a locker room

He was 14 when the series began.

CBS / Via Netflix

And here's Montana in Season 7:

adult Georgie at the dinner table

He's 21 now.

CBS / Via Paramount+

Here's a side-by-side:

Georgie in Season 1 and Season 7
CBS / Via Netflix / Paramount+

4.Here's Zoe Perry as Mary Cooper, Sheldon's mom, in Season 1:

Mary with a friendly expression

And here's Zoe in Season 7:

Mary in a striped shirt smiling
CBS / Via Paramount+

Here's a side-by-side:

Mary in Season 1 vs Season 7
CBS / Via Netflix / Paramount+

5.Here's Lance Barber as George Cooper Sr., Sheldon's dad, in Season 1:

George in a striped polo shirt sitting at a table, expressing surprise or confusion

Fun fact: Before he was cast as George, Lance had a minor role on The Big Bang Theory. He played Jimmy Speckerman, the former high school bully Leonard confronted in Season 5 Episode 11, "The Speckerman Recurrence."

CBS / Via Netflix

Here's Lance in Season 7:

George in a football coach polo sitting in an office
CBS / Via Paramount+

Here's a side-by-side:

George in Season1 and Season 7
CBS / Via Netflix / Paramount+

6.Here's Annie Potts as Connie Tucker, Sheldon's Meemaw, in Season 1:

Connie with expressive eyes, holding cards, dressed in retro-style blouse with earrings
CBS / Via Netflix

And here's Annie in Season 7:

Connie in a sweater over a blouse

On The Big Bang Theory, June Squibb played Meemaw.

CBS / Via Paramount+

Here's a side-by-side:

Connie in Season 1 and Season 7
CBS / Via Netflix / Paramount+

7.Here's Ryan Phuong as Tam Nguyen, Sheldon's childhood best friend, in Season 1:

Tam in a striped polo holding books

He was 15 at the beginning of the series.

CBS / Via Netflix

And here's Ryan in Season 7:

Tam in a solid polo, unbuttoned

He's 22 now.

CBS / Via Paramount+

Here's a side-by-side:

Tam in Season 1 vs Season 7
CBS / Via Netflix / Paramount+

8.Here's Wyatt McClure as Billy Sparks, Sheldon's neighbor, in Season 1:

A young Billy in a striped shirt

He was 8 when the series began.

CBS / Via Netflix

And here's Wyatt in Season 7:

teenage Billy in a striped shirt sitting on a couch

He's 15 now.

CBS / Via Paramount+

Here's a side-by-side:

Billy in Season1 vs Season 7
CBS / Via Netflix / Paramount+

9.Here's Mckenna Grace as Paige Swanson, Sheldon's friend/rival, when she made her debut in Season 2:

Paige in a striped polo and beaded necklace, sitting in class

She was 12 when she filmed her first episode.

CBS / Via Netflix

And here's Mckenna during her final appearance in Season 6:

Paige in plaid shirt sits at restaurant table, wearing plaid shirt

She's 17 now.

CBS / Via Netflix

And here's a side-by-side:

Paige in Season 2 and Season 6
CBS / Via Netflix

10.Here's Matt Hobby as Pastor Jeff, the Coopers' pastor-turned-neighbor, in Season 1:

Jeff seated in a suit with his Bible in hand
CBS / Via Netflix

And here's Matt in Season 7:

Jeff in a polo holding a coffee mug
CBS / Via Paramount+

Here's a side-by-side:

Pastor Jeff in Season 1 vs Season 7
CBS / Via Netflix / Paramount+

11.Here's Wallace Shawn as John Sturgis, Sheldon's professor and mentor, in Season 1:

Dr Sturgis in a suit and tie
CBS / Via Netflix

And here's Wallace in Season 7:

Dr Sturgis in a suit sitting in an office
CBS / Via Paramount+

Here's a side-by-side:

Dr Sturgis in Season1 vs Season 7
CBS / Via Netflix / Paramount+

12.Here's Craig T. Nelson as Dale Ballard, Connie's love interest and Georgie's boss, when he debuted in Season 3:

Dale in a t-shirt sitting in a dugout
CBS / Via Netflix

And here's Craig in Season 7:

Dale in a plaid shirt sitting
CBS / Via Paramount+

Here's a side-by-side:

Dale in Season 3 vs Season 7
CBS / Via Paramount+

13.Here's Emily Osment as Mandy McAllister, Georgie's partner, when she made her debut in Season 5:

Mandy in a floral dress smiling

And here's Emily in Season 7:

Mandy in a floral blouse at the dinner table
CBS / Via Paramount+

Here's a side-by-side:

Mandy in Season 5 vs Season 7
CBS / Via Netflix / Paramount+

14.Here's Melissa Peterman as Brenda Sparks, the Coopers' neighbor, in Season 1:

Brenda behind the counter at the bowling alley
CBS / Via Netflix

And here's Melissa in Season 7:

Brenda talking on the landline
CBS / Via Paramount+

Here's a side-by-side:

Brenda in Season 1 and Season 7
CBS / Via Netflix / Paramount+

15.Here's Doc Farrow as Assistant Coach Wayne Wilkins, Sheldon's P.E. teacher and George's coworker, in Season 1:

Wayne in a football coach attire with a whistle, on a practice field
CBS / Via Netflix

And here's Doc in Season 7:

Wayne looking sad, wearing a polo
CBS / Via Paramount+

Here's a side-by-side:

Wayne in Season 1 vs Season 7
CBS / Via Netflix / Paramount+

16.Here's Ed Begley Jr. as Dr. Grant Linkletter, Sheldon's professor, when he debuted in Season 2:

Dr Linkletter in a suit and striped tie
CBS / Via Netflix

And here's Ed in Season 7:

Dr Linkletter in a suit and tie sitting in an office
CBS / Via Paramount+

Here's a side-by-side:

Dr Linkletter in Season 2 and Season 7
CBS / Via Netflix / Paramount+

17.And finally, here's the Cooper family in Season 3 (when the title card changed to include all of them):

Georgie, George Sr, Missy, Mary, Sheldon, and Connie standing together in a field
CBS / Via Netflix

And here's the Cooper family in Season 7:

Georgie, Mandy, baby Constance, George Sr, Missy, Mary, Sheldon, and Connie standing together in a field
CBS / Via Paramount+

Here's a side-by-side:

the Cooper family in Season 3 versus Season 7
CBS / Via Netflix / Paramount+