Halle Berry has joined Twitter and Instagram. The 49-year-old actress certainly made a grand entrance when she signed up to the social networking sites on Tuesday by posting a topless shot for all to see. Taking to her new accounts, the brunette beauty uploaded the elegant photo, which sees her walking through a picturesque forest with no clothes on. She captioned the photo, saying, "Hi everyone. Welcome! Today is a very exciting day for me... I'm looking forward to sharing our world through images that reflect my emotions and perceptions." And, although she's only just joined the sites, the mother-of-two - who has Maceo, two, and Nahla, eight, from different relationships - wasted no time following her friends as she added Adele, Bruno Mars and Alicia Keys to her account.