How I Met Your Mother Christmas Pics 2010-12-03 11:30:05

The How I Met Your Mother gang has been celebrating the holidays big this year, first with a Hurley-infused Thanksgiving, and now with Christmas. But it looks like the gang is getting more than just presents under their tree — the episode is titled "False Negative," and from the way Marshall and Lily look in these pics, I think they have a big announcement. The episode airs on Dec. 13, but here's a sneak peek.

Photos courtesy of CBS