The dinner was closed to the press, but the White House released a short video clip and a pair of photographs.

Some of Silicon Valley's most prominent CEOs dined with President Obama Thursday night. (Image: The White House)

In , Jobs and Zuckerberg flanked Obama at the dinner table in the Woodside, Calif. home of venture capitalist John Doerr. In that photo, Jobs' face could not be seen, as he had his back to the camera.

Jobs' appearance has been the matter of intense speculation this week as reports claimed he was looking frail and that he had been spotted at the Stanford Cancer Center, where some claimed he is undergoing treatment.

The Apple CEO has been on , when he announced he was stepping away "so I can focus on my health."