Hi, I am approaching my A-levels in 1 time (currently in Year 11) , and so I would have to pick my A-level subjects which will then lead me on to my University (2 years later). I am practically obsessed with Theoretical Physics and I have already learnt high-level mathematics and so on, not to sound cheesy but I am practically in love with the subject. I want to pursue Theoretical Physics, however I am willing to only pursue it if I get accepted into Top-Tier universities, as I heard PHDs in Physics only find research positions if they graduate from Top Universities, is this true? If say I graduated from Cambridge University in Physics, then completed post-graduating in Caltech and then PHD in Harvard or Princeton? What is likelihood of being offered jobs in Research? note: Do not misunderstand, I do like physics but I do not want to end up pursuing it if I cannot do that for a living.