Of her busy schedule, White told "Early Show" co-anchor Erica Hill, "It's wonderful. At 89, you don't expect to be working this much. But I enjoy it."
Hill remarked, "Yeah, you're nonstop. Not only the TV movie and the series, but there was the Snickers commercials, there was 'Saturday Night Live.' The Emmy. I read at one point you were getting a little concerned about overexposure."
"Oh, a lot concerned about overexposure," White said. "It's like, 'Oh, my God, there's Betty White again."'
Hill responded, "You really think people do that? I think they say, 'Give me more!"'
White said working in her eighties is still fun -- and a privilege. She said, "When it can still be fun, and you're working, I'm in the middle of writing another book, so it's -- that's the deadline that keeps doing this. But, I've been so lucky with some good projects. And that's fun. And I'm having a ball with 'Hot in Cleveland' with the girls."
White is back for a second season on the show with Valerie Bertinelli, Wendie Malick and Jane Leeves.
White, whose schedule was packed at the time she was approached for the show, initially said she'd do the pilot, but wouldn't commit to the entire series.
She told Hill, "That was the proviso because my schedule, they just couldn't do it. So they picked us up for 10 shows. And they said, 'Would you, you know, dp a couple more?' Well, jellyfish here wound up doing all 10. Then they picked us up for 20 more. And guess who's doing it?"
White, known for her comedy, took a turn toward the dramatic in "The Lost Valentine," but as Hill said, "It's a beautiful movie. I said to you before we started, it is wonderfully sappy in this very best possible way. It tugs at your heartstrings. It's a beautiful love story."
White said, "(It's) a different role than I've ever done. It's -- it's a beautiful script. I just love it."
White plays a woman whose love for her husband, who died in World War II, endures. White said she drew heavily on her relationship with her own husband as she was preparing for the role.
"I happen to have been married to a man a loved very, very dearly. Still do," White said. "And that was my war, you know, so I knew the era quite well. And it brought back a flood of memories."
Jennifer Love Hewitt co-stars in "The Lost Valentine."
White called Hewitt "just lovely."
The soldiers featured in the film, White pointed out, "were all real veterans. And the color guard of sailors, those were real sailors. They weren't actors. And that's what got to me."
Hill said, "It's a moving story. It's a beautiful movie. And it's so interesting to see you in another role in which we, I think, fall even more in love with you."
White said, "Well I'm so used to doing comedy. ... But, this, you can't help but get caught up in it. So oh, I'm so glad you enjoyed it."
Hill replied, "I did. I really did. I'm not just saying it, I promise."
White joked, "Even if you are -- "
Hill finished for her with a laugh, saying, "Either way, you'll take it!."
The Hallmark Hall of Fame presentation "The Lost Valentine" airs Sunday at 9/8 Central time on CBS.