Hollywood film star Chris Evans and television actress Minka Kelly are back together after dating briefly in 2007, UsMagazine.com reported. \"She did a number on him him back then,\" a source told the celebrity news Web site about Kelly. \"But she reached out to Chris this time.\" \"He\'s still a little insecure, so he\'s being cautious,\" an insider close to Evans told UsMagazine.com. Evans is best known for his work in the \"Fantastic Four\" movies, \"Captain America\" and \"The Avengers.\" Kelly was a cast member of the TV shows \"Charlie\'s Angels\" and \"Friday Night Lights,\" as well as the film \"The Roommate.\"