Following today's casting announcement for Thor: Ragnarok one name was left out. Lady Sif played by Jaimie Alexander had been rumored to not be a part of the third Thor film due to her commitments to the NBC tv series "Blinspot".
One fan tweeted their worries about the actress not appearing in the film but Jaimie replied on her twitter account:
So there you go. Looks like Lady Sif will be in Thor: Ragnarok after all. How much time she'll be in the film remains to be seen though.
Thor: Ragnarok opens in theaters November 3, 2017.
http://comicbook.com/2016/05/21/is-jaimie-alexanders-lady-sif-in-thor-ragnarok-/