It was a rare sight to spot Shah Rukh Khan and Salman Khan together in public and it happened on Tuesday evening at Mehboob studios in Mumbai. Shah Rukh was at Mehboob to shoot a special episode of Bigg Boss, the popular reality show hosted by Salman Khan. SRK made the appearance to promote his forthcoming film Dilwale. While both the stars looked grim as they posed for shutterbugs outside the studio floor, we hope the show turns out to be much more fun. Pictures of the very serious looking Khans below: