The Fantastic Four star and film producer Warren aboard a plane from Los Angeles to Denver, Colorado last week (ends29Aug08) to attend the Democratic National Convention.
And they brought three months of honour along the ride - but should not be concerned about noise.
Warren wrote on his blog, "It is always trying for new parents to travel with their child because you never know if you are going to ruin everyone to flight with a baby screaming.
"We sit down and cross our fingers that she sleep. ... It does Nothing really exciting happened on the flight unless the energy of what was to come was already palpable."
But Warren admits their first-born has always been a well behaved baby: "So far, the honour was a great baby. Rarely cry. Choosing to speak so simple and Haiku or interpretation instead dance ... Yeah! " finding one to add to his wife of the collection.