Manchester United old boys Mikael Silvestre and Viv Anderson have paid the club a visit.
Most of the arrivals to Carrington this week involved United players and staff, as they prepare for a big game against Liverpool on Sunday.
But many were surprised to see Silvestre and Anderson pull up in their cars as well.
Silvestre is a club ambassador, having spent nine years at United as a player.
And Anderson is the first signing that Sir Alex Ferguson made at the club in 1987. He remained at the club for four seasons.