Apart from the obvious estranged father and son jodi, George Bush and Ricky Ponting, here are a few celebrities off the top off my head who totally look like one another. With suggested roles if ever cast together. Why hasn't it happened yet?
1. Brad Pitt and Benicio Del Toro: As hunky brothers
2. Rachel Weisz, Preity Zinta, Vyjantimala: Vyjanti-ji being mother and having one numbers desi legit girl child (Preity), and one numbers illegit firang girl child (Rachel).
3. Helen Hunt and Leelee Sobieski: Mother-daughter. (They're so similar it's creepy.)
4. Jack Black, Philip Seymour Hoffman: Brothers
5. Diane Lane and Jennifer Lopez: Seriously. Sisters.
Or cousins. Or aunt-niece, depending on makeup.
6. Robert Downey Jr and Javier Bardem: Be still my beating heart. Brothers.
7. Nicole Kidman and Naomi Watts: They do look like one another, they do. It's not just the Aussie thing. Anyway, they could be sisters or something.
(Nicole has to stop the botox. She'll start looking like Renee Zellweger soon, the way the both of them are going.)
I'm pretty sure there's many more I can't remember just yet. It will come to me. In the meanwhile, please feel free to suggest.