Three How I Met Your Mother actors are seen here, recreating an historic moment from 2008: the United States 4X200-meter relay team winning Gold at the Beijing Olympics.

It's taken years, but Barney finally finds a way to meet Ted's sister, Heather (Erin Cahill) when Lily slips up.

Don't worry, Dave didn't have to fight those guys all by himself, Barney and Ted had his back. Right?

The very sentimental Marshall (after just watching The Notebook) calls Robin a slut when she sleeps with someone for a reason other than love. What? The Naked Man isn't reason enough?

A fun picture of the beautiful cast of How I Met Your Mother. How classy do they look with their martinis and champagne?

Lily attempts to join the group of woooo girls, but when she lacks the necessary cowboy hat she rocks a firefighter hat she got from fire safety in school. Hawt.

Robin, feeling left out as the single girl in her group, bonds with a group of single party girls she calls the wooo girls. Jamie Lynn Sigler guest stars as one of the girls.

Alyson Hannigan plays Lily Aldrin, Marshall's live in girlfriend, then fiancee, then nothing, then fiancee, and then wife! Lily is a kindergarten teacher, aspiring artist, and mother to the group.

Cobie Smulders plays Robin Scherbatsky, a love interest for Ted at the beginning of the show and eventually just a good friend to the group. Robin hails from Canada.

Neil Patrick Harris plays Barney Stinson, Ted's wingman and good friend. Barney is a womanizer and pretty much the coolest character on television.

Jason Segal plays Marshall Eriksen, Ted's best friend and former roommate. Marshall is married to Lily and is a lawyer.

Josh Radnor plays Ted Mosby, the central character on How I Met Your Mother. Ted is telling the story of how he met the kids' mother.