Major upgrades will disrupt commuters wanting to travel on the Sydney City Circle train line this weekend.

Buses will replace train services between Central and Circular Quay stations via Museum on Saturday and Sunday.

Hundreds of people will also be participating in a fun run, which is set to start and finish at Circular Quay on the same weekend.

Chief Executive of Sydney Trains Howard Collins assures Ben Fordham there are plans in place to make sure disturbances are minimal.

He says the T4 Bondi Junction service “is running throughout the weekend” and will be stopping at Martin Place.

Services will also be operating in and out of Wynyard.

He is urging commuters to plan their trips and keep up to date with the Transport for NSW website.

Click PLAY below for the details