Olympic champion Jessica Ennis-Hill will begin the build-up to Rio 2016 by competing at the Loughborough International Athletics match on Sunday.
The 30-year-old is making a comeback from injury after an Achilles problem forced her to sit out the World Indoor Championships in March.
Ennis-Hill, who won heptathlon gold at London 2012, will compete in the javelin in her first outdoor competition of the season in Leicestershire.
The world champion pulled out of June's meeting in Gotzis, Austria and is not yet ready for a full heptathlon, although she has already secured her place in Rio.
"I am going to start off my outdoor season with a javelin competition at the Loughborough International to put a marker down for us to work with," she said.
"It is a firm favourite of both my coach and mine as the timing is always good, and the local support is amazing."
European Champion James Dasaolu will compete over 100m at the meeting, while European gold and silver medallists, Martyn Rooney and Matthew Hudson-Smith, respectively, will race in the relay.
Dwain Chambers and Harry Aikines-Aryeetey will also compete over 100m.