Kristen Wiig and David Bowie duet in film Secret Life of Walter Mitty Ben Stiller and Kristen Wiig in Sydney today. Picture: Brendon Thorne/Getty Images Source: Getty Images KRISTEN Wiig has recorded a duet with David Bowie. But before the star of Bridesmaids can join the Thin White Duke on stage at his next gig, she says, "I have to meet him first!" Wiig was in Sydney yesterday with funnyman Ben Stiller to promote Stiller's new film as director and star, The Secret Life of Walter Mitty . Wiig sings Bowie's Space Oddity in the movie, but had no inkling when she recorded her rendition of the song at New York's famed Electric Lady studio that it would be overlaid with Bowie's original - creating the virtual duet. I just found that out a couple of weeks ago - I guess they talked to him and it's now a duet on the soundtrack. It's so weird. I have to pinch myself. It was really fun recording that. I can't even describe it, just singing that song, it's David Bowie and I'm such a huge Bowie fan, it was intimidating. I've caught the bug now. I want to go on tour! Wants to out on tour ... Kristen Wiig with Ben Stiller promoting Stiller's new film The Secret Life of Walter Mitty at the Park Hyatt in Sydney, Australia. (Photo by Brendon Thorne/Getty Images) Source: Getty Images At the Australian premiere of The Secret Life of Walter Mitty in Sydney on Thursday night, the former Saturday Night Live comedian Wiig found herself having to protect her modesty when she sat down for a Q&A and realised her dress was a little too mini. During promotional duties yesterday she was wearing a black mini skirt and had to admit, "I kind of did it again! I have to remember, don't wear short skirts on these days. Wiig also appears in Will Ferrell's Anchorman sequel, which will have its Australian premiere in Sydney on Sunday. While the comedy's plot is shrouded in secrecy, Wiig's tidbit suggests it will deliver the laughs: "I will say that I had a hard time keeping a straight face. Most of my scenes are with Steve Carell, so it was very hard not to laugh. The Secret Life of Walter Mitty opens on Boxing Day