All right, Billy and Betty. Nobody here. Come on in.

5 seconds sound clip from the Santa Claus Conquers the Martians (1964) movie soundboard.

You can hear this line at 00:25:03 in the Blu-ray version of the movie.

Quote context

[...]

- Very well. Come along.

- This morning, two children disappeared mysteriously in the vicinity of Welsh Lake. The police have found no clues.

- And it seems as though Billy and Betty Foster have simply vanished into thin air.

- This appears to be a day when everything is vanishing into thin air.

- While local police are continuing their search for the missing children, the armed forces are continuing their search for the mysterious object from space.

- All right, Billy and Betty. Nobody here. Come on in.

- Now, I'm not supposed to bring you here. The chief's going to be awful mad if he finds us.

- Boy, wait 'til the kids at home find that I was in a real Martian spaceship.

- No... no, don't touch anything.

- Now, here. That's the anti-gravity generator.

[...]