A young driver was distracted for 10 seconds changing music on her car radio when she hit and killed a cyclist in Victoria.

Emma Kent, 24, tearfully pleaded guilty in the County Court on Wednesday to dangerous driving causing death.

Emma Kent outside court on Wednesday. Credit:AAP

She was trying to connect her phone's Bluetooth to the car audio when she struck 57-year-old Gareth Davies on Black Forest Drive at Macedon on December 10 last year.

"That's what I was doing that distracted me," Kent told police after the crash.