Shawnie Costello was born on 1 June 1976 in Adair County, Kentucky, USA. She is an actress, known for Dumb and Dumberer: When Harry Met Lloyd (2003), Buffy the Vampire Slayer (1997) and Heroes (2006).

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The Biggest Movies and TV Coming in September

"The Gentlemen" and "Slow Horses" return this fall, while the "Reacher" spin-off series "Neagley" makes its debut. See our guide of the biggest Fall TV and streaming releases.

2026 Fall TV and Streaming Watch Guide

&quot;The Gentlemen&quot; and &quot;Slow Horses&quot; return this fall, while the &quot;Reacher&quot; spin-off series &quot;Neagley&quot; makes its debut. See our guide of the biggest Fall TV and streaming releases.

Get a closer look at these actors from their many TV and streaming series roles.

Streaming Stars, Then and Now

Shawnie Costello and Julie Costello in Off Centre (2001)

Shawnie Costello and Julie Costello in The Man Show (1999)

Shawnie Costello and Julie Costello at an event for Dumb and Dumberer: When Harry Met Lloyd (2003)

Eric Christian Olsen and Derek Richardson in Dumb and Dumberer: When Harry Met Lloyd (2003)

Sarah Michelle Gellar in Buffy the Vampire Slayer (1997)

Ali Larter, Hayden Panettiere, Sendhil Ramamurthy, Milo Ventimiglia, Masi Oka, Noah Gray-Cabey, and James Kyson in Heroes (2006)

Shawnie Costello

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