EXCLUSIVE: Comedy writer-producer Gregg Mettler has signed a two-year overall deal with 20th Century Fox Television. Under the seven-figure pact, he will join the studio’s new ABC comedy series How To Live With Your Parents For The Rest of Your Life as a co-executive producer while also developing and supervising new projects. “Gregg’s reputation is that he is super smart and funny with a great comedic voice of his own,” 20th TV chairman Gary Newman said. “We believe that he would be a great addition to any of our existing series and that he has a great show in him.” Mettler cut his teeth at Carsey-Werner with stints on 3rd Rock From The Sun as well as That 70’s Show, on which he worked for seven seasons, working his way up the ranks to co-executive producer. The writer-producer, repped by UTA and Ken Richman, most recently served as a co-executive producer of ABC’s Cougar Town.