Princess Eugenie has been pictured putting on a cheery display as she left hospital with her husband Jack Brooksbank and their newborn son.The 30 year old was seen sitting in the backseat of a black car with her baby boy safely in his carrier beside her while her other half was behind the wheel.The first-time-mum looked gorgeous as she wore a red, green and white tartan dress with a classic camel coat over the ensemble to ensure she keeps warm in the chilly winter weather.The star, whose son