In this week's Instagram round-up, there was much partying to be done with Sarah Jessica Parker, Jessica Chastain and Diana Ross all celebrating their birthdays.
January Jones was also commemorating a special event - the end of Mad Men. On her Instagram account Betty Draper paid tribute to her co-star, on-screen husband Jon Hamm, with a poignant message.
As usual though, many a celebrity posted up snaps of their younger selves. Blake Lively showed us a picture of herself as a kid and Eva Mendes reminisced about her first red carpet appearance.
See more of our favourite pictures from the week in the gallery below