Heroes hottie Hayden Panettiere and younger brother Jansen enjoy some brother-sister bonding time at the premiere of the family adventure The Spiderwick Chronicles held on the Paramount Studios lot in Los Angeles on Thursday.

The Spiderwick Chronicles is a 2008 film based on Holly Black and Tony Diterlizzi’s bestselling children’s book series of the same name. The story is about three children who battle goblins and other magical creatures who are after Arthur Spiderwick’s Field Guide.

For the rest of us common folk, The Spiderwick Chronicles doesn’t open in theaters until Valentine’s Day. But you all will be too busy to watch this movie because you’ll be watching Jumper!

Also pictured below, one of the Spiderwick stars, Freddie Highmore.

25+ pictures inside of Spiderwick stunner Hayden Panettiere… More Here! »

Heroes hottie Hayden Panettiere rocks out an older Hollywood look for Old Navy’s Celebration of “New Year, New Old Navy” on Thursday at NYC’s Eyebeam Atelier (a not-for-profit arts and technology center).

Check out this recent interview with Hayden during her trip in Washington D.C. She talks about ‘teaming up’ with presidential candidate Barack Obama to help her Save the Whales! campaign.

Hayden demurred, “He was very supportive. He grew up in Hawaii around whales and dolphins. We exchanged cards. We’re going to have a conversation.”

10+ pictures inside of Hayden Panettiere celebrating Old Navy… More Here! »

Heroes hottie Hayden Panettiere continues her effort to lead the fight against commercial whaling with a news conference on Tuesday in Washington D.C.

As the spokeswoman for the “Save the Whales Again!” foundation, Hayden was joined by John Kerry and Nick Rahall

35+ pictures of Hayden Panettiere’s whale of a tale… More Here! »

Hayden Panettiere led the rally against the resumption of commercial whaling in Washington, D.C.’s Dupont Circle on Sunday.

The 18-year-old Heroes hottie was greeted with rousing applause as she gave her speech in front of two dozen supporters, including her momager Lesley. Milo would be so proud of his girl!

Tomorrow, Hayden will meet with representatives from the embassies of Japan, Norway and Iceland to question their outdated whaling practices. You can also check out her recent interview about saving the whales on CNN.

SAVE THE WHALES!

15+ pictures inside of Hayden Panettiere saving the whales again… More Here! »

Hayden Panettiere makes a Milo-less appearance at the re-launch party of Ai Spa in Beverly Hills on Friday.

The 18-year-old Heroes hottie was joined on the red carpet by younger brother Jansen and co-host Vivica A. Fox. The pair later ate at Flame restaurant with their parents. Video below!

Today, Hayden will be traveling to Washington D.C. because she has a big day ahead of her tomorrow! She’ll be leading the whale rally to stop the resumption of commercial whaling. Speak your mind, sister!

Hayden Panettiere will lead a rally against a resumption of commercial whaling at 1 p.m. this Sunday, January 27, in Washington, D.C.’s Dupont Circle. The event kicks off a whirlwind trip to the Nation’s Capital for Hayden, who will later speak with policymakers and students to encourage increased whale protection.

The 18-year-old Heroes star is a spokesperson for the Save the Whales Again! campaign, which is calling on the United States to stand up for whales at the International Whaling Commission and take diplomatic and economic action against whaling countries. After the rally, she will speak at Georgetown University. On Monday, she will meet with representatives from the embassies of Japan, Norway and Iceland to question their outdated whaling practices.

“Whales face increasing threats from climate change, ship strikes, entanglement in nets, and chemical and noise pollution, yet Japan, Norway and Iceland continue to kill them in increasing numbers,” Hayden said. “I am looking forward to talking with officials who actually make and carry out our policies, as well as fellow young people who will be voting in the upcoming election—I want our voice to be heard.”

On Tuesday, Hayden will speak at a 1 p.m. press conference hosted by House of Representatives Natural Resources Committee Chair Nick Rahall (D-WV). She will be joined by Rahall and Senator John Kerry (D-MA) in urging the US Government to reinstate its former leadership role protecting whales from commercial slaughter. An evening reception with Members of Congress and their staff is the final stop on her trip.

JOIN HAYDEN AND SAY “NO” TO COMMERCIAL WHALING!

Hayden Panettiere is spotted checking out of St. John’s Medical Center in Los Angeles on Thursday.

The Heroes sweetheart was seen carrying a prescription.

Say it with me now: “Hayden is not pregnant. Hayden is not pregnant. Hayden is not pregnant.”

If you haven’t already, help Hayden save the whales and Raid Hayden Panettiere’s Closet!!

Hayden Panettiere has come up with a great way for fans to help her save the whales!

The 18-year-old Heroes hottie has opened an online store where you can purchase items directly owned and even worn by Hayden. She’s selling it all–caps, hoodies, bottoms, dresses,outwear, shirts, shoes and watches.

You know you want Hayden’s Cinderella watch!

All proceeds will be donated to The Whaleman Foundation to help save the whales.

Raid Hayden Panettiere’s closet at PanettiereCloset.com.

25+ pictures inside of pieces from Hayden Panettiere’s closet… More Here! »