Launched 15 years ago, the Steam Packet's Ben-my-Chree is celebrating a decade and a half of service.
Built in the Netherlands at a cost of £25million, the ship has ferried 3.9million passengers across the Irish Sea.
The Steam Packet says in the last three years she has chalked up a reliability record of almost 98 per cent.
But CEO Mark Woodward says they are already in discussions about her replacement and the long-term size of the fleet.
As she turns 15, former Chief Minister Donald Gelling and his wife Joan looked back at their role in the christening of the 'Girl of my Heart':