EXHIBIT 12(B)

I, Elizabeth M. Forget, President and I, Jeffrey A. Tupper, Chief Financial
Officer and Treasurer of Met Investors Series Trust (the "Trust"), each certify
that:

1. This Form N-CSR filing for the Trust (the "Report") fully complies with the
requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934;
and

2. The information contained in the Report fairly presents, in all material
respects, the financial condition and results of operations of the Trust.

By:   /s/ Elizabeth M. Forget
      ---------------------------------
      Elizabeth M. Forget
      President

By:   /s/ Jeffrey A. Tupper
      ---------------------------------
      Jeffrey A. Tupper
      Chief Financial Officer and Treasurer

Date: August 30, 2007