DeGeneres asked the first daughter, a guest on Wednesday's show, if she could reach her dad by phone whenever she wanted, to which Jenna Bush replied, "Sure."
Encouraging her guest to call the president, DeGeneres covered the phone with her hands to protect the private number as Jenna Bush dialed and joked, "I'm not going to get anything I asked for for Christmas."
The talk-show host reassured her, "We're not barging in while they're in their pajamas or something."
First lady Laura Bush got on the phone and said, "I'm just sitting here with Daddy," prompting DeGeneres to say, "I wanted to say hi to Daddy."
President Bush took the phone and was told by his daughter, "This is 'The Ellen DeGeneres Show.'"
"Well, that's great!" President Bush said, asking DeGeneres, "How's my little girl doing?"
"Oh, she's great," DeGeneres said.
Jenna Bush asked the president if he was mad, but he said: "No, not at all. ... I'm glad to talk to you. I'm glad to talk to Ellen."
He also wished the audience a Merry Christmas and told his daughter he loved her.