Commissions by the winners of 2008's Inspire Young Composers' Competition will be performed at 5.45pm today.
Members of the Aurora Orchestra will play from among pieces by Tom Rose, Tom Curran, Men Gei Li, En Liang Khong and Alexander Nikiporenko as the Proms Intro before Prom 30.
It will follow an inspiring day of workshops for this year's winners, who are taking their first steps towards writing for 2009's BBC Proms.
Edited highlights of the performance will be broadcast by Radio 3 following Prom 46 on 19 August.