Amanda Seyfried & Alec Baldwin
The stars say hello after running in together other while walking their dogs in NYC.
Amy Adams & Elizabeth Berkley
The actresses recently collided while shopping at a candy shop in L.A.'s Grove mall.
Ben Affleck & Halle Berry
The Oscar winners met up while strolling around the streets of Santa Monica in May 2012 with their respective fams.
Sienna Miller & Chris Hemsworth
The actress was pregnant when she baby-bumped into the Avengers hunk and his wife, Elsa Pataky, in London in June 2012.
Kelly Osbourne & David Beckham
The Fashion Police cohost was surprised when the soccer stud and wife Victoria showed up at her bro Jack's 27th birthday dinner.
Ethan Hawke & Katie Holmes
The actor was hanging out with baby daughter Indiana in NYC when Tom Cruise's ex walked by and greeted the fellow thesp in October 2012.
Joe Jonas & Shia LaBeouf
In August 2011, the singer and Transformers actor walked right by each other in West Hollywood without even noticing.