It's not often that Kristen Stewart pops up on Instagram, but the actress has been snapped alongside her Camp X-Ray co-stars Lane Garrison and Peyman Moaadi. K-Stew is currently shooting the film about a soldier assigned to Guantanamo Bay and unsurprisingly there are already whispers of a romance with shaved headed hunk Garrison. The actor, who is best known for playing the role of David "Tweener" Apolskis on the television series Prison Break has somewhat of a past having been found guilty of vehicular manslaughter in 2007 and arrested for misdemeanor battery for allegedly hitting his ex girlfriend last year. Despite Internet speculation we doubt that K-Stew is really eyeing up her colleague, but she certainly looks more smiley than she has done since her break up with Twilight hunk Robert Pattinson earlier this year.
Meanwhile there's no doubt that Nicole Richie and Joel Madden have the hots for each other. The couple and their two children Harlow and Sparrow are currently enjoying a European vacation and by the looks of their Instagram photos Mr. and Mrs. Madden-Richie are more besotted than ever. Nicole revealed a pic of herself and her man in an Italian harbour with the caption "Love in Portofino", while Joel shared a snap of his wife and kids, titled "Seeing my dreams".
And finally, Girls star Lena Dunham has been having some fun with her boyfriend Jack Antonoff (of American band Fun) and his sister, designer Rachel Antonoff. The trio wore matching doggy jumpers as they dined in New York.
See our pick of the best celebrity Instagram pictures of the day in the gallery above...