Speaking to Fabulous Digital, the insider said: “This year there will be a birthday gift from Archie and the odds are on a sepia or black and white photograph of her precious son in a solid silver frame from Aspreys.
“The precious present is likely to have an engraving chosen by Harry that will make it extra special.
“And Harry has a weakness for designing jewellery for Meghan, so it is expected that the royal will design another stunning piece - likely to be earrings - as a Sussex surprise.”
Prince Harry, who has designed jewellery for Meghan in the past, including her engagement ring, is likely to spoil the Duchess with a piece of jewellery to mark her first birthday as a mother.
The royal source continued: “Harry is always very thoughtful so I’m sure he has some special things planned for her, but there’s nothing Meghan’s asked for.
“She’s very clear that she’s already got the best gift she could ever get – her little dream baby Archie.”
This week has been huge for Meghan who unveiled the September issue of British Vogue, which she guest edited, and also announced a clothing line that she will launch later in the year to benefit the UK's Smart Works charity.