Jessica Biel celebrates the 21st anniversary of '7th Heaven' with flashback pic

The 35-year-old actress will always be Mary Camden!

Jessica Biel will always be Mary Camden!

The 35-year-old actress took to Instagram on Saturday to celebrate the 21-year anniversary of 7th Heaven's premiere with an adorable throwback photo.

RELATED: Beverly Mitchell Celebrates '7th Heaven' Anniversary With Adorable Must-See Throwback Photos!

"7th Heaven first aired 21 years ago today. Happy birthday, 7th Heaven- lemme buy you a drink," Biel wrote alongside a flashback snap of herself and her on-screen sister, Beverley Mitchell.

7th Heaven first aired 21 years ago today. Happy birthday, 7th Heaven- lemme buy you a drink.

A post shared by Jessica Biel (@jessicabiel) on Aug 26, 2017 at 10:04am PDT

Mitchell also made an appearance in a behind-the-scenes shot Biel shared on Thursday, alongside their on-screen brother, Barry Watson.

"Photo evidence I was rocking mom jeans way before I was actually a mom," the now-mom to 2-year-old son Silas captioned the photo.

RELATED: Jessica Biel on Working and Raising Son Silas: 'It's Hard Trying to Find a Balance Between Work and Family'

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