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

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

'7th Heaven' Turns 20! Flashback to the Set Before the Show's 1996 Debut

Cue the Nostalgia! Favorite TV Reunions

Jennifer Drysdale

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Jessica Biel

<div>Jessica Biel will always be Mary Camden!</div>
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<div>The 35-year-old actress took to Instagram on Saturday to celebrate the 21-year anniversary of<em>&nbsp;7th Heaven</em>'s premiere with an adorable throwback photo.&nbsp;</div>
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    data-ctd-shortcode-title="RELATED: Beverly Mitchell Celebrates &#039;7th Heaven&#039; Anniversary With Adorable Must-See Throwback Photos!">RELATED: Beverly Mitchell Celebrates '7th Heaven' Anniversary With Adorable Must-See Throwback Photos!</div><p>"<em>7th Heaven</em>&nbsp;first aired 21 years ago today. Happy birthday,&nbsp;<em>7th Heaven</em>- lemme buy you a drink. ?," Biel wrote alongside a flashback snap of herself and her on-screen sister, Beverley Mitchell.&nbsp;</p>
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    data-ctd-shortcode-url="https://www.instagram.com/p/BYQ8T39liXt/">&nbsp;</div><p>Mitchell also made an appearance in a behind-the-scenes shot Biel shared on Thursday, alongside their on-screen brother, Barry Watson.&nbsp;</p>
<p>"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.&nbsp;</p>
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    data-ctd-shortcode-title="RELATED: Jessica Biel on Working and Raising Son Silas: &#039;It&#039;s Hard Trying to Find a Balance Between Work and Family&#039;">RELATED: Jessica Biel on Working and Raising Son Silas: 'It's Hard Trying to Find a Balance Between Work and Family'</div><p>ET was with Biel and the rest of the 7th Heaven cast <a href="http://www.etonline.com/tv/196635_flashback_teenage_jessica_biel_reveals_the_joys_of_working_on_7th_heaven" target="_blank">on set </a>of the WB show's first season in 1996. Watch below.&nbsp;</p>
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