Marshmallow gets dragged along as Lilypad attempts to put an end to Barney's playbook and deceit.

When Marshall thinks Lily is pregnant and tells her she's been gaining weight, she goes nuts on Marshall.

What is the group arguing over here? Whether or not Lily and Marshall should find out the sex of their baby.

Lily talks to her father about trying to find a nanny for the new baby on How I Met Your Mother. "Nannies" is the third episode of the show's eighth season.

Barney is all ready to get hitched! But Lily and Marshall suddenly have a lot to contemplate.

No, Robin's not drowning Barney but she might like to considering how hungover he is on the morning of their wedding on How I Met Your Mother.

Marshall pops open a bottle of champagne to celebrate with Lily in the upcoming episode of HIMYM, "Bagpipes."

Lily looks a bit horrified to be hearing some news from Marshall in the upcoming HIMYM episode, "Bagpipes."

Lily and Marshall try to push the margaritas during the best night ever while Barney just heads straight for the tequila.

Lily and Marshall test their friends to find out who would make the best godparents to Marvin on How I Met Your Mother. "Who Wants To Be a Godparent" is the fourth episode of the show's eighth season.

A special wedding guest arrives on How I Met Your Mother. "Gary Blauman" is the 21st episode of the show's last season.

Up top! Marshall and Lily share a high-five, much to Barney's chagrin, in this How I Met Your Mother scene.