Now everybody has a smartphone in their pocket, there's an easy way to document that chance meeting with your favourite actor or singer.
We asked readers on our Facebook page for their starriest shots and were inundated with famous faces.
Here are another 17 of the very best, in the second of our picture galleries.
See the first part here.

9. Samuel L. Jackson
Davina Thomson managed to get a picture with the Pulp Fiction actor when he was playing golf in St Andrews. Photo: UGC

10. Sean Aston
Laur Andy says that the Stranger Things star was a "proper gent". Photo: UGC

11. James McAvoy
Chloe Hynd was lucky enough to be at the world premiere of Filth, in Edinburgh, when she met the Scottish acting star. Photo: UGC

12. Rylan Clark-Neal
Gillian Carson Crossland was quick to grab her phone for a snap when she spotted the television presenter. Photo: UGC

