Thousands of runners are getting ready for the Great North Run in Newcastle this weekend.
It's the biggest half marathon in the world and loads of top athletes - including top runner Paula Radcliffe - will take part in Sunday's race.
On Saturday loads of children ran the Junior and Mini Great North Run, a shorter version of the adult course.
And on Sunday it's the turn of the 47,000 older runners, as they run the full 13.1 miles (21km) distance.
The race will be Paula Radcliffe's first for nearly two years. She took a break to have her baby daughter Isla but has said she can't wait to get back to running.
She said: "It's about getting the racing gloves on, discovering those old instincts again and blowing out the cobwebs."