Well, that is definitely Hailee Steinfeld!
A video from the set of the currently shooting Hawkeye Disney+ series was shared online earlier today, and while the footage wasn't the clearest, it did appear to confirm that the Bumblebee actress had indeed joined the cast as Kate Bishop. Now, a second video has found its way online, and this one leaves no doubt!
This footage was obviously taken by someone who was able to get much closer to the action, and shows Bishop, Clint Barton (Hawkeye) and Lucky the Pizza Dog running down a flight of stairs as they rush to catch the subway.
Marvel has yet to officially confirm that Steinfeld signed on to play Bishop on the Disney+ show, but now that these videos are out in the open, we may get an announcement fairly soon.
Plot details are still mostly under wraps, but the miniseries is expected to follow Barton as he trains his apprentice in order to prepare her to take on the Hawkeye mantle. A recent rumor claimed that Black Widow star Florence Pugh is also set to reprise the role of Yelena Belova for the show, but that's yet to be confirmed.