An update is presented of the measurement of the properties of the newly discovered boson using the the full $pp$ collision data sample recorded by the ATLAS experiment at the LHC for the channels H\rightarrow\,\gamma\gamma and $H \rightarrow ZZ^{(*)} \rightarrow 4l$, corresponding to integrated luminosities of about 4.8 fb$^{-1}$ at \sqrt{s}=7\,TeV and 20.7 fb$^{-1}$ at \sqrt{s}=8\,TeV. The combined mass measurement derived from the H\rightarrow\,\gamma\gamma and $H \rightarrow ZZ^{(*)} \rightarrow 4l$ channels is m_H=125.5 \pm 0.2\,\text{(stat)}\, ^{+0.5}_{-0.6}\,\text{(sys)}\,GeV. The combination of all final states, including the $H \rightarrow \tau^+\tau^-$ and $H \rightarrow b\bar{b}$ channels using data corresponding to integrated luminosity of about 4.8 fb$^{-1}$ at \sqrt{s}=7\,TeV and 13 fb$^{-1}$ at \sqrt{s}=8\,TeV and the $H \rightarrow WW^{(*)} \rightarrow l\nu l\nu$ channel using data corresponding to an integrated luminosity of 13 fb$^{-1}$ at \sqrt{s}=8\,TeV, is reported in terms of the combined signal strength ($\mu$) and production and decay mode specific signal strengths. The combined signal strength is determined to be \mu = 1.43 \pm 0.16\,\text{(stat)}\pm 0.14\,\text{(sys)} at a mass of $125.5$ GeV.

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