The Prince of Wales teamed up with street vendor Dave Martin for the second year running, selling The Big Issue in Hammersmith, London.
A photo on social media showed
Prince William donning an official seller's vest and cap while sharing a friendly moment with Martin.
The prince's social media post celebrated his return: "Great to be back with Dave, selling the latest edition of the @BigIssue once again!"
During their time together on Tuesday, the pair sold magazines and exchanged Christmas cards.
Prince William's recent Homewards initiative aims to combat homelessness in the UK by following models like Finland's, which have nearly eliminated the issue.
The project focuses on collaborative local efforts and could provide up to £500,000 in funding. Martin, having attended the initiative's launch, expressed his belief in the prince's personal commitment to the cause.