Intense lasers are now the brightest source of relativistic electron-positron pair jets in the laboratory. Up to 1012 highly relativistic pairs are routinely produced in experiments using 1 – 10 ps lasers with energies from 100 - 2000 J, focused to intensities between 5x10^18 - 10^21 W/cm2. The experiments produce jets of ions, electrons and positrons from which the pairs can be focused and manipulated. If the plasma condition is met, laser-generated pair plasmas can be exploited for laboratory experiments mimicking physical processes in various astrophysical systems including Gamma Ray Bursts. This talk will review the experimental results to date and discuss the future prospects in this research area.