Erin Cahill as Heather Mosby in How I Met Your Mother

Still of Erin Cahill in Beverly Hills Chihuahua 2

Erin Cahill in Blue Eyed Butcher on Lifetime

Erin Cahill and Kyle Bornheimer in Angel from Hell (2016)

Erin Cahill and Blayne Weaver in Cut to the Chase (2016)

Erin Cahill and Marcus Coloma in Beverly Hills Chihuahua 3: Viva La Fiesta! (2012)

Erin Cahill and Ryan Carlberg in 108 Stitches (2014)

Erin Cahill, Michael Copon, Jason Faunt, Kevin Kleinberg, and Deborah Estelle Philips in Power Rangers Time Force (2001)

Zachary Bostrom and Erin Cahill in Power Rangers Time Force (2001)

Erin Cahill in Power Rangers Time Force (2001)

Erin Cahill and Jason Faunt in Power Rangers Time Force (2001)

Erin Cahill, Tom Mison, and Nicole Beharie in Sleepy Hollow (2013)

Erin Cahill and Tom Mison in Sleepy Hollow (2013)

Erin Cahill and Wes Brown in Storm War (2011)

Erin Cahill and Hugh Laurie in House (2004)

Bailey Chase and Erin Cahill in Saving Grace (2007)

Erin Cahill, Michael Copon, Jason Faunt, Kevin Kleinberg, Deborah Estelle Philips, and Vernon Wells in Power Rangers Time Force (2001)