According to CNN:
Ted Cruz, who defeated an establishment backed candidate in last week’s Texas Republican Senate primary, will receive a key speaking slot at the Republican National Convention, a senior GOP official confirms to CNN.
Republican National Committee Chairman Reince Priebus will put out a press release Wednesday announcing that Cruz and four other elected officials including Wisconsin Gov. Scott Walker, Florida Attorney General Pam Bondi, Puerto Rico Gov. Luis Fortuño and Georgia Attorney General Sam Olens will address the convention.
I’ll update this post when I know more.