The incident occurred in Princes Street Gardens, late on Saturday evening (June 5).
As reported earlier in the Evening News, Police Scotland received the report of a serious sexual assault at 9.50pm on Saturday.
Now, a man has been arrested and police say an investigation is ongoing.
A statement read: “A 26-year-old man has been arrested in connection and enquiries are ongoing,” a spokesperson for Police Scotland said.
More to follow.