Researchers say that the wider you grin and the deeper your laughter lines are, higher are your chances of living longer.
According to a new study, which studied 230 pictures of major league baseball players printed in the 1952 baseball register, broader smiles and wrinkles around eyes point to a positive outlook on life, implying better long-term health.
Each picture came with a listing of the player's vital statistics, including age, weight, height and marital status.
Then, in the study, researchers at Wayne University in Michigan, America, ranked players according to their smiles and laughter lines, spanning from none at all, to partial and then those with a full blown toothy grin and crinkled eyes.
They then compared the chart to the lifespan of each player to reach their conclusions, reports The Telegraph.
Out of the 184 players who had since died, those in the "no smile" section lived an average of 72.9 years while the players in the "partial smile" group lived to around the age of 75.
The ones with the widest grins lived an average of 79.9 years - a full seven more years compared to their dull counterparts.