Top Pair Production Cross-Section Results At Tevatron

We present the latest measurements of the cross section of the production of the top quark in t (t) over bar pairs from p (p) over bar collisions at root s = 1.96 TeV.Measurements are performed using up to 9.1 fb-1 of data collected by the CDF and DO experiments at the Tevatron.The first combination of measurements from the two experiments is presented. From six different measurements, the cross section is measured to be sigma (pp -> t (t) over bar, root s = 1.96 TeV) = 7.65 +/- 0.42 pb.