A method of controlling a pickup manoeuvre of a vehicle, wherein the vehicle gains speed starting from a stationary condition, wherein the vehicle is of the type comprising a hybrid propulsion system including an in-series arrangement comprising an internal combustion engine, a first clutch, an electric motor, a second clutch and a gearbox having an input shaft and an output shaft connected to the drive wheels of the vehicle, said first clutch being arranged between the internal combustion engine and the electric motor, and said second clutch being arranged between the electric motor and said input shaft of the gearbox, said method being characterized in that: - the pickup manoeuvre is actuated starting from said stationary condition of the vehicle, with the internal combustion engine off, the electric motor active and said first clutch in an open condition, whereby connection between the internal combustion engine and the electric motor is interrupted, - in a first phase of the pickup manoeuvre, advancement of the vehicle is obtained by progressively but not completely closing the second clutch so that the input shaft of the gearbox is set in rotation with an increasing rotational speed, while the electric motor also rotates at an increasing speed which is higher than the rotational speed of the input shaft of the gearbox at any instant, with the second clutch which is in a slip condition, - upon a request for a start of the internal combustion engine, said first clutch is progressively closed so that the internal combustion engine starts to be driven by the electric motor, while the second clutch is kept in a slip condition so that the rotational speed of the electric motor is higher than a minimum rotational speed which allows operation of the internal combustion engine, and - the slip condition of the second clutch is maintained until the internal combustion engine and the electric motor rotate substantially at a same speed, higher than the rotational speed of the input shaft of the gearbox, and once this condition is reached a closing manoeuvre of the second clutch is started to bring the internal combustion engine, the electric motor and the input shaft of the gearbox to rotate all substantially at the same speed. - the pickup manoeuvre is actuated starting from said stationary condition of the vehicle, with the internal combustion engine off, the electric motor active and said first clutch in an open condition, whereby connection between the internal combustion engine and the electric motor is interrupted, - in a first phase of the pickup manoeuvre, advancement of the vehicle is obtained by progressively but not completely closing the second clutch so that the input shaft of the gearbox is set in rotation with an increasing rotational speed, while the electric motor also rotates at an increasing speed which is higher than the rotational speed of the input shaft of the gearbox at any instant, with the second clutch which is in a slip condition, - upon a request for a start of the internal combustion engine, said first clutch is progressively closed so that the internal combustion engine starts to be driven by the electric motor, while the second clutch is kept in a slip condition so that the rotational speed of the electric motor is higher than a minimum rotational speed which allows operation of the internal combustion engine, and - the slip condition of the second clutch is maintained until the internal combustion engine and the electric motor rotate substantially at a same speed, higher than the rotational speed of the input shaft of the gearbox, and once this condition is reached a closing manoeuvre of the second clutch is started to bring the internal combustion engine, the electric motor and the input shaft of the gearbox to rotate all substantially at the same speed.