The "Invasion!" crossover is upon us, and the stars of "Supergirl," "The Flash," "Arrow" and "DC's Legends of Tomorrow" could not be more excited about it. In a new video, David Ramsey, Emily Bett Rickards and Caity Lotz discuss the reasons they're looking forward to the grand debut of The CW's four-show crossover.

RELATED: Check Out the Arrowverse Crossover’s Out-of-This-World Opening Credits

The cast shares their favorite moments from the 4 night crossover event! #DCWeek continues on #Arrow, TONIGHT at 8/7c on The CW. pic.twitter.com/Ia5JAJuSRI

— Supergirl (@TheCWSupergirl) November 30, 2016

"This is a huge endeavor right now," Ramsey shared.

"It's nuts, because everyone is super weird, so we're like a whole bunch of weirdos hanging out together," Rickards added with a laugh.

The featurette also offers some new clips from the remaining two episodes of the crossover, including a frosty interaction between Wild Dog and Flash, a Lance sister reunion and a close encounter between Ray Palmer and Sara.

Starring Melissa Benoist as the Girl of Steel, “Supergirl” airs Mondays at 8 pm ET/PT on The CW. The network is also home to Grant Gustin as the Scarlet Speedster in “The Flash,” airing Tuesdays at 8 pm ET/PT, Stephen Amell as the Emerald Archer in “Arrow,” airing Wednesdays at 8 pm ET/PT and Arthur Darvill, Brandon Routh and Caity Lotz in “DC’s Legends of Tomorrow,” airing Thursdays at 8 pm ET/PT.