It seems Elizabeth Olsen can tell her famous twin sisters apart by which one remembers her birthday.
The 25-year- old actress appeared on Wednesday's episode of Bravo's “Watch What Happens Live” and revealed some family gossip after being pressed by a caller to choose her favorite sister.
"You have two sisters, I also have two sisters, you have to prefer one over the other. Who do you like better: Mary-Kate or Ashley?" the fan on the phone asked the brunette star.
"Ashley remembered my birthday, but I don't hold grudges against Mary-Kate forgetting mine," the young Oslen replied.
"She was out of town! I should have just said my brother," Olsen, who just turned 25 over the weekend said.
"Ashley's in the lead today, but tomorrow MK could do something amazing," host Andy Cohen chimed in.
Despite Mary-Kate's slip up, Olsen insisted the family is "all very close."
"I'm very close with my brother as well. I should have just said him. That would have been the easier scapegoat."
"You are though, to clarify, feeling closer to Ashley today," Cohen said, fueling the sibling rivalry.
"Mary-Kate is literally going to come home from her vacation and shoot me that I said that," Olsen joked.
"I think, from the last time I was in Jamaica, text signals do work," Cohen added, implying the 27-year-old fashion designer could have still reached out to her little sis.
Olsen was quick to jump to Mary-Kate’s defense.
"How often when you're on vacation do you look at your phone and read the date?" she said.
"You don't really read the date. You're just like, 'This is day three of my vacation.’”
A caller asks Elizabeth what is the craziest rumor that she has heard about her sisters and while describing the rumor, she also denies ever having a nose job (starts around 1:50)
Whose your favorite Olsen? And do you believe she hasn't had a nose job?