Black Lightningleading manCress Williamsis just as thrilled about crossing over with theArrowverseas you are that he is.

Its a move thats been a long time coming, especially for Williams.

They were already like, Are you going to be in the crossover?

Black Lightning; Arrow

Bob Mahoney/The CW; Jack Rowand/The CW

When are you gonna be in the crossover?

They always wanted it from day one.

Were not in the Arrowverse.

Were not in the Supergirl universe.

Were in the Black Lightning universe.

Those whispers apparently crescendoed after the big fan event.

The unofficial rumblings behind the scenes had been just growing.

They all are really cool people, so Im excited to play with them, he says.

Which actor is he particularly excited about sharing the screen with?

It sounds like the politically correct answer, but its not: Its all of them, he says.

That will be a lot of fun.

Im just starting to get to know [Supergirls] Melissa [Benoist].

Shes legitimately one of the nicest people Ive ever met.

I think itll be really fun.

The family is probably the most disjointed weve ever had it, said Williams.

Its the whole Markovian conflict.

Black Lightningpremieres Monday, Oct. 7 at 9 p.m. on The CW.