Munn, an ambassador for the charity, collected the items for an auction which is taking place as an online-only sale running until December 10.
Helping run the auction is antiques dealer Naomi Thompson, who specialises in accessories and is the author of Style Me Vintage, Clothes and co-author of Style Me Vintage, Accessories.
She said: “The range of items, both modern and vintage, brings an eclectic and exciting mix of celebrity memorabilia to the market that is also perfectly wearable.”
Munn hopes the sale will raise money for the Give the Gift of Listening campaign. The project focuses on people struggling alone at Christmas and Samaritans’ services will be available around the clock.