Jaimie Alexander Teases 'Agents of S.H.I.E.L.D.' Appearance, And Solo Sif Series?

Actress discusses guest star turn on 'Marvel's Agents of S.H.I.E.L.D.' and possible future for character.

We've already had a touch of Thor's home world Asgard on "Marvel's Agents of S.H.I.E.LD." But starting tonight, it's a full-scale invasion as Sif (Jaimie Alexander) guest stars, teaming up with the Agents to find a runaway sorceress named Lorelai (Elena Satine).

After appearing in two "Thor" movies, one wouldn't expect Alexander to be one of the first actors to make the jump to Marvel's small-screen companion to the movies, but it turns out the gig came from a not-so-surprising source.

"Well, funny enough I had seen Clark Gregg at a party about two weeks before I got the call from Marvel," Alexander told us over the phone in advance of the episode. "And he said, 'Hey, so I was curious if ever 'Agents of S.H.I.E.L.D.' ever wanted you to appear, would you be game? Would you do it?' And I said, 'Oh yeah, Clark, you know I'd do anything for ya.' Two weeks later I got this phone call, and I said, aw, he was buttering me up."

Though Alexander has appeared in the Marvel Cinematic Universe multiple times, Lady Sif hasn't been the best developed of characters. She's often turned up to offer some advice to Thor, or fight in a big battle sequence. Here on TV, Alexander finally got to bring some of the promise that always existed on screen.

"In the films we would shoot many scenes with Lady Sif, but they would end up getting cut for story purposes, or for time purposes," Alexander recalled. "It was one of those things where I've done things before in the films but they haven't aired. So for me, it was showing more vulnerability, showing more compassion. You do get to see that side in the films, but its very short lived. In 'Agents of S.H.I.E.L.D.' you do get to see a very tough side of her, but a softer side too."

Before you think Sif heads to Earth to give the Agents a bunch of hugs, no worries: there's lots of fighting, too. When asked whether Sif would be dusting it up with the show's resident bad-ass fighter Melinda May (Ming-Na Wen), Alexander differed from giving up any spoilers; but did heap praise on the actress.

"We had such a good time working together, and we just understand each other's sense of humor, on and off camera," Alexander said. "It was just a blast. There's that great awkwardness between these two worlds. She's from Asgard, they're from Earth; and when the two worlds collide it's so awkward that it's funny."

Alexander also had nothing but nice things to say about the rest of her co-stars: praising the "adorable" Iain De Caestecker; her rapport with Gregg from their time on the "Thor" set; Satine who she thinks is perfect for the role of Asgardian seductress Lorelai; and even fellow guest star Bill Paxton, who she had no scenes with but called "the most chill person I've met in my entire life."

Lucky for her that the cast and crew did have such a "good attitude," because the pace of television was greatly amped from that on the "Thor" set.

"I honestly got the call to do this episode, it was such short notice that I didn't have time to prepare fight-wise," Alexander noted. "What would take us about two weeks to shoot in the movies, a certain fight sequence took us a half day to a full day on the show. The CGI was minimal. It was a lot fun! I feel like I got my hands dirty in the best way possible."

As for the future of Sif beyond this episode, Alexander wouldn't give up any spoilers on further connectivity with the Marvel movies, and as for "Thor 3" only laughed and said that, "Yes, all I can say is there's a writer on board who knows the world extremely well."

But one spin-off Alexander would totally be into? A Lady Sif TV series titled, say, "Journey Into Mystery" based on her solo comic book title.

"I absolutely would be [into that]," Alexander said. "I really love Marvel and am really committed to them and I absolutely love Sif and am very committed to her. So I would love to do that. That would be pretty awesome."

Make sure to watch Sif's debut on "Agents of S.H.I.E.L.D." tonight at ABC at 8 p.m. ET, and let Marvel know if you want more!