Cheek dimples are small indentations that appear on the cheeks when a person smiles. They are caused by a variation in the structure of the facial muscles, specifically the zygomaticus major muscle. This muscle may be shorter or split, leading to the characteristic dimpled appearance. Dimples can be present at birth or develop later in life. These features are often considered attractive and can enhance a person's smile. While cheek dimples are primarily a genetic trait, they can also be influenced by factors such as age and weight changes. Many people admire celebrities with dimples, as they are often associated with youthfulness and charm.