My son Ryan rolled over at 2 months. Freaked me and my husband out! We would put him to sleep on his back, then a couple hours later would hear him fussing. When we'd look in his crib, he would be on his tummy and mad as heck, LOL. The first few times my husband and I looked at each other and asked "Did YOU put him on his tummy?" Of course, neither one of us had. Ryan turned over all by himself for about a week. Then it was like he forgot how to roll over, and didn't do it again for 2 months!