The couple were introduced by a mutual friend in 2002, but didn't start dating until about two and a half years later.
They met through a mutual friend at the local mall right next to a music store.
I only met with them as a favor to a mutual friend.
A mutual friend and record producer suggested that all five drop their current bands and form a new band.
Often, siblings will communicate indirectly through a parent or a mutual friend of relative.
It's rather like having a conversation about a mutual friend, with one who knows him much better.
At the gala, guests find out that 1936 is curtains for a mutual friend.
The two were introduced by a mutual friend and discovered they had exactly the same vision for a band.