He said: “I can’t wait to watch their antics as they grow and join the wider flock and develop their own distinct characters.”
Wasilewski added: “We have increased the feeding for the pelicans, so they have all the fish they need.
“Right now, our focus is on giving these chicks the safest and best possible start in life, so that they can be nurtured by their parents and grow into strong, healthy adult birds.”
He urged visitors to the park not to approach the chicks, to keep dogs on leads around the lake, and to avoid causing the baby pelicans any distress while they establish.
The Royal Parks charity, which manages St James’s Park, said it was working closely with wildlife organisations such as Blackpool Zoo, the Royal Veterinary College and the Zoological Society of London to provide expert care for the chicks.
The birds have not yet been named.