Searches for New Physics in Events with Multiple Leptons with the ATLAS Detector

Events containing several leptons are useful probes of new phenomena due to the low background from Standard Model processes. We look for anomalous production of events with three or more leptons, as well as search for excited leptons, heavy leptons and heavy neutrinos. The searches use data recorded in 2011 at $\sqrt{s}=7~$TeV and in 2012 at $\sqrt{s}=8$~TeV by the ATLAS experiment at the LHC.