Even the country's funniest men behind desks had awkward phases -- some more than others -- and we found the proof.
Between the bygone facial hair and school picture day smiles, you'll get a kick out of guessing which of these leaked yearbook photos belong to which of our favorite late night hosts.
While some of them look like different people, others look just the same as ever, and only one of them looks like he REALLY doesn't want to be at soccer practice.
Check out our six picks below and click over to Snakkle.com to see all the rest!
Late Night Hosts Before The Fame
Guess Who?(01 of12)
(credit:Seth Poppel/Yearbook Library/<a href="http://snakkle.com/" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Snakkle" data-vars-item-type="text" data-vars-unit-name="5bad0068e4b04234e8558a98" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://snakkle.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="12" data-vars-position-in-unit="14">Snakkle</a>)
Conan O'Brien(02 of12)
(credit:<a href="http://snakkle.com/" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Snakkle" data-vars-item-type="text" data-vars-unit-name="5bad0068e4b04234e8558a98" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://snakkle.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="11" data-vars-position-in-unit="13">Snakkle</a>/Getty)
Guess Who?(03 of12)
(credit:Seth Poppel/Yearbook Library/<a href="http://snakkle.com/" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Snakkle" data-vars-item-type="text" data-vars-unit-name="5bad0068e4b04234e8558a98" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://snakkle.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="10" data-vars-position-in-unit="12">Snakkle</a>)
Jon Stewart(04 of12)
(credit:<a href="http://snakkle.com/" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Snakkle" data-vars-item-type="text" data-vars-unit-name="5bad0068e4b04234e8558a98" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://snakkle.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="9" data-vars-position-in-unit="11">Snakkle</a>/Getty)
Guess Who?(05 of12)
(credit:Seth Poppel/Yearbook Library/<a href="http://snakkle.com/" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Snakkle" data-vars-item-type="text" data-vars-unit-name="5bad0068e4b04234e8558a98" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://snakkle.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="8" data-vars-position-in-unit="10">Snakkle</a>)
Bill Maher(06 of12)
(credit:<a href="http://snakkle.com/" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Snakkle" data-vars-item-type="text" data-vars-unit-name="5bad0068e4b04234e8558a98" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://snakkle.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="7" data-vars-position-in-unit="9">Snakkle</a>/Getty)
Guess Who?(07 of12)
(credit:Seth Poppel/Yearbook Library/<a href="http://snakkle.com/" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Snakkle" data-vars-item-type="text" data-vars-unit-name="5bad0068e4b04234e8558a98" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://snakkle.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="6" data-vars-position-in-unit="8">Snakkle</a>)
Jimmy Fallon(08 of12)
(credit:<a href="http://snakkle.com/" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Snakkle" data-vars-item-type="text" data-vars-unit-name="5bad0068e4b04234e8558a98" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://snakkle.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="5" data-vars-position-in-unit="7">Snakkle</a>/Getty)
Guess Who?(09 of12)
(credit:Seth Poppel/Yearbook Library/<a href="http://snakkle.com/" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Snakkle" data-vars-item-type="text" data-vars-unit-name="5bad0068e4b04234e8558a98" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://snakkle.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="4" data-vars-position-in-unit="6">Snakkle</a>)
Jimmy Kimmel(10 of12)
(credit:<a href="http://snakkle.com/" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Snakkle" data-vars-item-type="text" data-vars-unit-name="5bad0068e4b04234e8558a98" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://snakkle.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="3" data-vars-position-in-unit="5">Snakkle</a>/Getty)
Guess Who?(11 of12)
(credit:Seth Poppel/Yearbook Library/<a href="http://snakkle.com/" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Snakkle" data-vars-item-type="text" data-vars-unit-name="5bad0068e4b04234e8558a98" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://snakkle.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="2" data-vars-position-in-unit="4">Snakkle</a>)
Stephen Colbert(12 of12)
To see even more late night hosts before the fame, click over to Snakkle! (credit:<a href="http://snakkle.com/" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Snakkle" data-vars-item-type="text" data-vars-unit-name="5bad0068e4b04234e8558a98" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://snakkle.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="1" data-vars-position-in-unit="3">Snakkle</a>/Getty)