Today's Instagram Pics of the Day is inspired by some of the #ThrowbackThursday photos that the stars have been sharing this week. First off we've got designer Matthew Williamson who's delved into his archive to post an image of himself holidaying with his good friend Sienna Miller - it's as if he heard our plea to see more from the actress on Instagram. The pair are snapped together just after a swimming race as Williamson reveals, "Sienna won, hands down".
Meanwhile, fresh from rehab, Lindsay Lohan is ready to remind her fans how damn cute she used to be. The star shared flashback photos of her early modelling days, wearing pieces by Tommy Hilfiger and Donna Karan. In one photo a freckly Lohan is seen staring into the camera with a braid in her hair, stripy top and denim waistcoat while in another she has plaited pigtails, a white cotton dress and check shirt. We'd almost forgotten how adorable she once was!
Kourtney Kardashian used #TBT as an opportunity to pay homage to her style inspiration, Jane Birkin. The reality TV star shares this icon in common with presenter Alexa Chung - which is slightly odd considering the two women don't dress in any way alike. However, we love the retro photos that Kourtney has been posting, including pics of Birkin posing on her own and with fellow '60s screen siren Brigitte Bardot. Take a look at other A-list Bardot fans here.
And finally, Lena Dunham revealed that she was a virgin at 19 with her #ThrowbackThursday photos of a letter she sent in to TimeOut New York‘s sex columnist Jamie Bufalino back in 2005. Dunham said, "#tbt to that time I wrote a letter to Jamie Buffalino, the sexpert in Time Out NY and he ANSWERED. Please note "I have a reasonable amount of sexual experience..." #2005 #virgin". She then posted the reply: "...And Jamie's generous answer. Thank you, bro."
Want more Instagram action?
Click through the gallery to see the best celebrity pics on Instagram today...