Singer Parke, 12, and organ-playing Martyn will be joined by fellow finalists, pianist Paul Gbegbaje and boyband New Bounce on the tour, hosted by Stephen Mulhern.
The jaunt will kick off in Newcastle on Saturday, June 11 - a week after the winner is crowned in this weekend's final show.
Britain's Got Talent Live Tour 2011 will visit cities including Glasgow, Nottingham, Manchester, Cardiff and Birmingham, as well as feature dates at both London's Wembley Arena and The O2.
Tickets for the shows are on sale now.
The Britain's Got Talent live semi-finals continue throughout the week on ITV1.
The full list of tour dates are:
- June 11 - Newcastle Metro Radio Arena
- June 12 - Edinburgh Playhouse
- June 13 - Aberdeen AECC
- June 14 - Glasgow Clyde Auditorium
- June 16 - Nottingham Capital FM Arena
- June 17 - Liverpool Echo Arena
- June 18 - Manchester Evening News Arena
- June 19 - Wembley Arena
- June 21 - Motorpoint Arena Cardiff
- June 22 - Brighton Centre
- June 23 - London O2 Arena
- June 24 - Sheffield Motorpoint Arena
- June 25 - Birmingham NIA
- June 26 - Bournemouth BIC
> Read our interview with Britain's Got Talent finalist Jean Martyn
> More Britain's Got Talent news