Julia Roberts is one of the celebrities who has joined Instagram in recent months She thought this pic from Toronto was funny, so she posted it on Instagram At first she found it too stressful to post on social media, but now she’s found her groove: Julia Roberts at the Toronto International Film Festival Jennifer Garner says at first she thought people wouldn't want to see her "boring" life. That’s changed Jennifer Garner Natalie Portman, Tom Cruise, Nicole Kidman and Michael J. Fox are other A-listers who joined Instagram in recent months