2.
Ilana and Eliot Glazer.
3.
Jason and Justine Bateman.
5.
Macaulay and Kieran Culkin.
6.
Luke and Chris Hemsworth.
7.
Emily and Zooey Deschanel.
8.
Hilary and Haylie Duff.
9.
James and Dave Franco.
10.
Charlie Sheen and Emilio Estévez.
11.
Elle and Dakota Fanning.
12.
Demi Lovato and Madison De La Garza.
14.
Donald and Stephen Glover.
15.
Penélope and Monica Cruz.
17.
Kate McKinnon and Emily Lynne.
18.
Maude and Iris Apatow.
Who's your favourite sibling actor duo? Tell us in the comments!