Scarlett Johansson's Black Widow & Sam Jackson's Nick Fury Make Their 'Iron Man 2’ Debut... On Twitter

Scarlett JohanssonThe "Iron Man 2" news keeps coming in, thanks to Jon Favreau's very active Twittering. Today, the director of the "Iron Man" franchise has provided fans with two bits of information sure to get the crowd buzzing -- the first of which involves the film's new female lead.

"Scarlett's first day on set in the Black Widow outfit," the director wrote today. "You've never heard a crew get so quiet so fast."

Scarlett Johansson's involvement in the movie as Natasha Romanoff has already been well publicized -- but the character was originally referred to as Tony Stark's assistant, leading some to wonder if we'd even see her action-packed persona. Yet Favreau's comments confirm what everyone has hoped to hear: Johansson will definitely appear as a fully costumed version of the Black Widow.

In addition to verifying the arrival of an in-costume Black Widow, Favreau also confirmed that Samuel L. Jackson was filming his role as Nick Fury on the "Iron Man 2" set. The secrecy surrounding the S.H.I.E.L.D. director's cameo in the first film is clearly out the window, as Favreau not only revealed the character's involvement -- he spilled the beans on who he's filming with.

"Now shooting first scene with Tony Stark and Nick Fury," declared Favreau.

Putting the obvious excitement aside, there are at least two interesting aspects about this news. First, Favreau mentions specifically that this is the first scene between Fury and Stark. Clearly, Jackson's role as Fury has been elevated significantly from his end-of-movie cameo in the first "Iron Man." We could've guessed that based on the return of S.H.I.E.L.D. Agent Coulson and Jackson's monumental nine-picture deal, but it's nice to get the official word from Favreau himself.

Also worth noting is that these two Twitter updates on Black Widow and Nick Fury's respective roles came within three hours of one another. Unless Johansson's scene is incredibly brief, the likelihood that Black Widow will share screen-time with Nick Fury has just been raised substantially. Will she pose a threat to the eyepatch-wearing agent, or will the two spies align with each other?

Guess we'll have to wait until "Iron Man 2" hits the big screen for that answer -- or, at the very least, until Favreau's next Twitter update!

Are you psyched to hear about the official arrival of Black Widow? How about Nick Fury's presumed upgrade for "Iron Man 2"? Let us know your thoughts in the comments!