Nearly 1,000 people have signed up to host gatherings to raise funds for the charity's work caring for sick and homeless animals and providing pet care advice.
The charity has produced free fundraising packs for supporters that include invitations, a poster, stickers and a tea party quiz sheet.
The Blue Cross has also released the results of its tea drinkers' survey to drum up press interest in the event and hosted a photo call at Claridge's Hotel, London, where Blue Cross rescue dogs were snapped alongside celebrities drinking tea.
Crisis is holding its annual 3.5 mile Square Mile Run on 7 June in the City of London. The homelessness charity hopes to raise £150,000 through the event. The run starts at St Paul's Cathedral and follows a route that takes in the Globe Theatre and the Tower of London and finishes at the Millennium Bridge. More than 2,000 runners are expected to take part in the run, entry for which costs £12 per person until 25 May and £15 thereafter. It is open to anyone aged over 18.
The Red Cross in Europe is to benefit from the We Speak Image fashion campaign. Camera manufacturer Canon has recruited 17 fashion designers across Europe to create a series of collections inspired by images taken by their countrymen. The company is asking people to upload images that they feel represent the spirit of their nations to the campaign's microsite. Canon will donate 34p to Red Cross societies for each image uploaded.