  We present $\Lambda\Lambda$ correlation measurements in heavy-ion collisions
for Au+Au collisions at $\sqrt{s_{NN}}= 200$ GeV using the STAR experiment at
the Relativistic Heavy-Ion Collider (RHIC). The Lednick\'{y}-Lyuboshitz
analytical model has been used to fit the data to obtain a source size, a
scattering length and an effective range. Implications of the measurement of
the $\Lambda\Lambda$ correlation function and interaction parameters for
di-hyperon searches are discussed.
