Jessica Biel

Jessica Biel thinks she is "too boring" to be a great actress.

The 'Illusionist' star - who is dogged by rumours that her relationship with Justin Timberlake is in trouble - believes she is too grounded and leads too much of a normal life for people to have a high professional opinion of her.

She said: "I might just be way too boring to ever be a really great actress."

When told great actresses can having boring lives but great stars "kick up dust everywhere", the actress told Vogue magazine: "I don't do that. Maybe I should do a little bit more of that. A dust kicker-upper might be kind of fun.…"

Jessica also spoke out about posing near-naked for Gear magazine aged just 17, admitting she was "terribly embarrassed" about the pictures and her parents' outrage.

She said: "I really wanted to go to college, and it all kind of happened at the same time. I did this photo shoot; the photo shoot came out; it was terribly embarrassing. I had to apologize to everybody, including my parents. It was a big learning experience: learning how to have boundaries and how to say no."

Film stars Jessica Biel, Emile Hirsch and their group have completed their climb up Africa's Mount Kilimanjaro, Elizabeth Gore told People.com.

Gore is a United Nations Foundation executive who also participated in the Summit on the Summit trek to raise awareness and funds for global water programs.

Gore said the expedition reached the mountain top Tuesday after six days of hiking.

"I? walked over to Jessie and gave her a big hug," Gore told People.com via satellite phone. "The two of us embraced and? we just cried. Every single one of us was in absolute tears. The temperature was zero degrees and so many people were struggling ... . People had hurt limbs, people had altitude sickness."

Gore went on to say the hardest part of the trek was the end when the group was faced with "a complete whiteout."

"There was so much? snow, we could only see two or three feet in front of us. So we had to line? up like a chain to make it to the final point. I'm so proud that every single one of us 12 climbers made it," she said, adding they headed back down almost immediately and reached the base of the mountain Wednesday night.

Celebrities Jessica Biel, Emile Hirsch and Lupe Fiasco are climbing Africa's Mount Kilimanjaro to highlight global clean water needs, their Web site says.

The trio are taking part in the Summit on the Summit expedition in an effort to put the spotlight on the global water crisis, and raise money for clean water programs.

People.com reported the stars spent several days visiting a village near Arusha, Tanzania, before they started their climb Thursday.

"Meeting the people and community in Tanzania … has been an invaluable and eye-opening experience for me," the magazine's Web site quoted Biel as saying Tuesday. "My hope is that others will be inspired to find ways that they can help; starting simply in their homes and continuing to other parts of the world. We are all in this together."