New York, Nov 15 Former US Vice President candidate Sarah Palin has said that she was not aware that her eldest daughter Bristol was sexually active before she learned the teenager, then 17, was pregnant.

"Truthfully, we were devastated," The Washington Times quoted Palin, as saying.

Bristol has a child out of wedlock with the 19-year-old Wasilla resident Johnston, which Palin famously announced days after accepting the Republican vice presidential nomination in September 2008.

The 17-year-old gave birth to son Tripp, in December. But, Bristol and Johnston split soon after the birth. (ANI)