The 'Skyfall' hitmaker had her first child with boyfriend Simon Konecki last October but is planning on celebrating a month early at the upmarket Beaufort Hotel in London's wealthy Chelsea district, reported Sun online.
"Adele wants to mark Angelo's first birthday in style," a source said.
Famous faces who have been invited to the bash include the birthday boy's godfather, comedian Alan Carr, and Adele's friend, Sid Owen.
Adele has been keeping a low profile since the birth of her baby and spending a lot of time with her family in the seaside town of Brighton, England, where they have a 2.5 million pounds home.
Earlier this year Adele was among a number of other A-Listers shortlisted for the tile of Celebrity Mum of the Year 2013 in the UK.