The twins started on the show at just nine months old back in 1987 (viaIMDb).
And while the Olsens are not identical twins but rather fraternal, according to E!
News, their similarities are immense, and telling them apart can be quite tricky.
In fact, the differences are so small, it comes down to a freckle.
The twins also explained that Ashley is one inch taller than Mary-Kate.
But, possibly the biggest difference between the two is their dominant hand.
Ashley is right-handed and Mary-Kate is left-handed.
PerWe Got This Covered, they prefer to keep their lives private despite their fame.
In fact, they don’t even have social media, a rarity among people their age.
